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PC won't turn on. Fans spin for half a second and then turn off.

Q: PC won't turn on. Fans spin for half a second and then turn off.

Good day!

My cousin asked me to troubleshoot the problem of his desktop. He was telling me that it is not turning on. I was caught by surprise when i turned on the PC when suddenly I heard some kind of explosion. It sounds like a blown capacitor or something to that effect. I immediately unplug the power cord from the wall outlet. I checked all the capacitors and looking for any damage and fortunately it's all ok. I smell the PSU to check if there's any short circuit occured and there was no foul odor or something. I removed the PSU from the casing for and opened it for inspection. I found out that the fuse exploded and broke into 2 pieces. I don't bother to repair it but instead I bought a new 700 watts PSU.

After replacing the PSU I turned on the PC but i found out that the CPU fan will spin for half a second and turn off. Led green light is on but no post or beep sound. I did some troubleshooting and these are as follows:

1. I removed the motherboard from the casing and put it on top of the table with cardboard underneath.
2. Clean the RAM stick and tried on other slot.
3. Clean CPU heatsink and fan since it was clogged by dirt and replace thermal paste.
4. Replaced the CMOS battery and move jumper pin 1-2 to 2-3 for about 2 minutes.
5. I turn on the PC without the video card, hardisk and keyboard.

SPECS:
Motherboard: asus h81m-c
CPU: Intel core I7
RAM: 8gb

Btw, prior to the above steps, right after replacing PSU I just clean the RAM and turn it on but the fan will just spin for half a second and turn off.

Any help will be highly appreciated.

Thank you

Sent from my GT-I9205 using Tapatalk

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RELEVANCY SCORE 200
Preferred Solution: PC won't turn on. Fans spin for half a second and then turn off.

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RELEVANCY SCORE 111.2

I would be very grateful to anyone who can help me fix this problem that is driving me crazy.
My PC wont turn on at all. Fans do not spin.
I thought that my PSU is the problem and then i bought a new one.
I used two Motherboards (i know at least one of them is working)..
I tried using other RAM modules.
I even put my parts in other case.
Also, i switched power cables for psu.
I took out CMOS battery and cleaned it and put it back but nothing.
But nothing fixed the problem.
I am starting to believe that the problem is with either CPU or GPU.
I am no expert but i think that the fans would at least spin even if the GPU and CPU are faulty.
Can anyone please help, thanks?
 

A:PC won't turn on, fans do not spin

You will need to post your full specs for anyone to help .........
 

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RELEVANCY SCORE 111.2

Hiya,
Here's what has been happening:
PC won't POST. I can't get to Windows or even the BIOS.
This has been an ongoing, intermittent (on/off) problem which seems to have now become permanent.
There are no beeps when powering on.
I replaced the PSU with a new CoolerMaster one in an effort to resolve the issue. No luck.
I've unplugged almost everything from the motherboard and tried powering on, which includes:
HDD
RAM (2 sticks: 4GB, 2GB)
CD/DVD ROM
Peripherals (including, embarrassingly, the Power button...)
Mobo fan (which is the one that wavers every few minutes)
The only items I did not unplug/disable are the CPU fan and any onboard ones, e.g. integrated graphics.

Some history now:
The PC has been having this problem for some time now, i.e. months. Eventually, it would POST and then go to Windows until Friday. Now, it just sits trying to POST. The motherboard fan will waver from slow to fast every few minutes. (I timed it and the wavering has no exact pattern.)

Side observation:
When removing the 4 gigs of RAM, leaving only the 2 gigs, PC freaked out and turned on and off several times before finally POSTing and going to Windows normally.

Today, I removed the CMOS battery for quite some time, maybe an hour or more. The PC was unplugged when removing it and after so I hit the power button. After popping the battery back in and turning back on, I still get nothing.

Can I turn the PC on with the CMOS battery removed? Do you think it would help ... Read more

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RELEVANCY SCORE 108.8

A few months ago i built a system through a popular computer company, ibuypower, and was initially pleased with the performance of my PC. I was then forced to take a few months away from the system due to work, during which it was stored in a safe dry location. Upon returning the system had the issue stated in the title. I have replaced the power supply with a far better one (went from 450w to a 700w) and the same issue peristed with the new power supply, which works with the tester it was shipped with. I've read about it possibly being the Ram, so i have ordered a 16gb ddr3 ram upgrade (2x - 8gb sticks) and they should be here within a week. I also read that it may be the CMOS battery but those are unable to be shipped through the mail so im having trouble tracking those down here in Japan. If somone could help me figure this out i would greatly appreciate it. I've cleaned and tested everything i can and i can't find an issue other than it physically wont function. Also, in case anyone was wondering this thread was written from my laptop, not the PC.

Much Apreciated
 

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RELEVANCY SCORE 105.2

Hi there,i just unpacked my laptop from a flight and now it suddenly doesn?t turn on anymore.when I press the power button nothing happens, no indicator leds, nothing. When I release the button I hear that thud noise you hear when you manually kill a laptop by keeping the button down. Now the weirdest thing: when I plug in the adaptor the fans start spinning like crazy, immediately when I plug it in, I don?t even need to push the power button.the same thing happens when the laptop is unplugged and I keep the power/reset button down for a longer time, the fans start spinning out of control but no leds, no nothing, and they immediately stop when I let go.If anyone has any clue how this could be or what to do please tell me. I will contact the seller on Monday (I have had this laptop for 2.5 years, thank god the insurance runs for three years) but as I?ve just moved to another country I?m not sure if that?s going to work out.Any help or suggestions appreciated.

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RELEVANCY SCORE 92

Hi,

I am having trouble getting my new system to boot and am so frustrated. I dont know what to do.

CPU= AMD 3700+ (ada3700bnbox)
mobo= Asrock 939s56-m

When switched on the fans all spin once and then stop. There are no bleeps.

It is not the PSU. It cannot be... I have tried several. It is not the ram. I have tried many sticks.

The only thing I can think is that the mobo does not support this processor without a bios upgrade- thats what Asrock's website tells me. But I caanot upgrade the bios without the system booting up.

Could this cause the system to act as it is doing? Or is there some other possible explanation?

Thanks for any help
 

A:New system wont boot... fans spin half way and stop

do you have case fans? do they continue to spin ? or just spin once, if only once it has to be a power issue
 

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RELEVANCY SCORE 90.4

I have a bit of a strange issue with my computer. Forgive me if I'm a little too descriptive, but I'm not sure which details are relevant and which are not for such a problem. First, the specs:

Model: eMachines T2984
Operating System: Windows XP Service Pack 2
Processor: Intel Celeron D Processor 340, 2.93 GHZ, 256K L2 Cache, 533 MHZ FSB
Power Supply Unit: Bestec Model: ATX-250-12E REV: P7
Motherboard: I can't tell, but it appears to be an Intel motherboard by the number of Intel labels on it
RAM: 512 MB DDR SD originally, added 1 GB a couple of months ago
Let me know if you need anything else...

Yesterday, I got home from shopping around 1PM, and I tried to start the computer. I pushed the power button, and nothing happened. I checked all of the cords, and they were all plugged in. Not knowing what else to do, I opened up the case to see if there was something obviously wrong. The only thing that I noticed (other than a bunch of dust) was that the power supply unit was still hot. I shut the computer down about 5 hours earlier after about 20 minutes of use, so it seemed strange that the power supply was still hot. I unplugged the computer just in case there was some sort of fire hazard.

At this point, I called a friend who suggested that the problem might be with the motherboard or the power supply unit.

A few hours later, I plugged it back in to try to get it to work. As soon as I plugged it in, the entire unit suddenly started "running" by itsel... Read more

A:Computer Doesn't Turn on, Fans and Some Lights Turn on Automatically

I would suspect that the Power Supply Unit (PSU) is going south. If you have a spare one laying around, install it and see if the problem goes away.
You can buy a new,better PSU from Newegg for about $40.00. I have used a Thermaltake 430 watt in one of my machines for some time now and it works well.
You will have to check the size of your PSU to be sure a new one will fit into the eMachine.
Here's the page with that PSU on it. It's the last one on the list.
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010320058+50001379&name=Thermaltake
 

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RELEVANCY SCORE 89.6

Hi!
I have this issue that when I turn on my computer, the power LED does not turn on but you can hear the fans working properly. I don't the issue and I'm not much of an expert with computers. Please help me solve this issue because I'm completely clueless.
 

A:Try to turn on my computer but only the fans work and the power led does not turn on

How old is the computer, what was the last change you made to the computer and when you last shut it down did it shut down correctly?
 

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RELEVANCY SCORE 89.6

I can't turn my computer on. The fans and lights turn on for a second and then turn off. a few seconds later they'll turn back on and then turn back off. I've had this computer for 4+ months now, i built it myself. it recently started doing this but i'd just turn off the PSU (Power Supply Unit) and turn it back on and it woould fix it. now it doesnt fix it anymore. i've re-slotted the RAM (Random Access Memory) and pushed it in firmly, but that hasn't done anything. i've tried different power outlets and pushed everything into the MOBO (Motherboard), i havent messed around with CPU (Processor) because that's just a pain in the a**... i was wondering if there was anything else i could do before having to take it into a local repair shop, lol.

as for my computer specs

CPU (Processor): Fx-6300 AMD
GPU: R9-270x AMD
RAM (Random Access Memory): 8GB Ballistix sport
MOBO (Motherboard): ASRock 970 Extreme3 R2.0
PSU (Power Supply Unit): Corsair X500 w 80+
Case: Rosewill GALAXY

thanks
 

A:Fans turn on, lights blink and then turn off/on repeatedly.

First, I would unplug everything that isn't necessary. Everything external except for the keyboard and monitor. Internally, just leave the CPU, RAM and video card installed. See if it turns on. If not, you might try and test the power button. Disconnect the power button from the mobo. If the pin headers allow for it, use the reset button as the power button. If not, you can use a flat head screwdriver to power on the computer (cross the two pins for the power button with the blade of the screwdriver). If you do this, just be very careful. Touch only the power button pins and nothing else! You could easily damage components by touching the screwdriver to the wrong thing.

Some motherboards have a power button right on the board that you can press to power on the computer. I looked at a pic of your board and didn't notice one.

If that doesn't do it, plug the power button back in. You might try and play around with the RAM. I don't know if you have 2 or 4 sticks of RAM, but try and boot the computer with only one stick of RAM at a time. If there's a bad stick, you'll find it through this process of elimination.

If none of the above works, then it might be a bad PSU.
 

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RELEVANCY SCORE 84.8

Hey all I'm new to this forum but I've built a few computers in the past but have never experienced any problems like this.

Case: Powerspec Cooler master case
Processor: Intel i5 750(quad core)
Motherboard: Gigabyte H55M-UD2H
Powersupply:OCZ 500 watt Mod X Stream-Pro

Here are some pictures of my build and a video of what is going on.

Video: youtube.com/watch?v=UbuFZJQnlds

As you can see the PSU, CPU, and Case fans are turning on and the Motherboard LED lights are blinking and then they quickly turn off. I dont think its a problem with the Power Supply because I have already returned one with the same issue thinking it was defective.

Pictures:

wont let me post pictures =/

Any help is appreciated, thanks for your time!
 

A:CPU and PSU fans turn on but then quickly turn off as does everything else

Does your current BIOS version support your CPU?

Your 4 pin power connector looks to be missing.... Top right of the video 8secs in.
 

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RELEVANCY SCORE 74

Hello, I have put a new motherboard, power supply, and processor into a computer. The first time I turned it on with all peripherals plugged in, the fans stayed at max speed and it eventually shut down. I unplugged all peripherals except for the DVD drive, and then replaced the power supplie again and and the cpu has a temp of about 124 and the fans still stay at max speed, has not turned off yet.

Any Ideas??
 

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RELEVANCY SCORE 74

I have to hold in the off switch to get it to shut off. Is this a CPU or Motherboard pblm. and how would I determine which it is ?
 

A:when I turn on puter fans run but nothing happens.

Hi relee_1, welcome to TSG.

It could be a variety of things......can you give us some history on the problem? Is this a new machine? Did this just start happening out of the blue.......have you been inside the case playing around with anything?
 

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RELEVANCY SCORE 74

As the title says. It's a new gaming PC and nothing works like it was yesterday. It worked for like 4 boots. Now it wont connect to anything(my monitor, keyboard and mouse) and the fans go like double the speed
 

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RELEVANCY SCORE 73.2

I have an HP Pavilion a1520y and I went for a two month vacation this summer. When I returned I found out that my computer was doing something it has never done before in my life. When it goes into a low power state (i.e Shut down, hibernation, standby), the power button still stays lit and the fans go crazy. The only way to stop this is to pull the plug. It happens randomly so one week its fine then one day it acts up. I checked my motherboard and the caps are OK. I think there is something wrong with the Power Supply. Please Help Me! This is getting very annoying and it could bring something bigger and worse.

PS: I did upgrade my BIOS and it didn't help the problem.
 

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RELEVANCY SCORE 73.2

i just finished building my computer, and it loads into the BIOS fine, and all fans are working EXCEPT the power supply fans! this is driving me mad because ive checked all my connections and i cant find anything wrong. the chassis power plug is plugged into a 4-pin, the cpu fan is plugged into the cpu fan plug on the motherboard, and the 3-pin power supply fan pin is plugged into the pwr fan on the motherboard. (the manual for the case says to plug it into any fan plug on the case). where am i going wrong!?

case: antec 350W cant remember model number
motherboard: asus a8v deluxe
 

A:Power supply fans won't turn on!!!

*CORRECTION*


only the back fan of the antec power supply is not running. the inside fan is running. is this supposed to happen? it makes me nervous seeing the exhaust fan of the PSU just sitting there frozen. does it only turn on when it needs to...? :suspiciou
 

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RELEVANCY SCORE 73.2

Hi. I just built a new computer, and it has 4 case fans, with lights, and 2 lighted fans on the power supply. This is in my room, and awfully bright if I leave on. I've looked into fan speed controllers, but was wondering, is there a way to have them automatically turn off when I put my computer into sleep mode? I have a clear acryllic case, so thats my biggest problem right there. Thanks.
 

A:Can I have fans turn off automatically in sleep

If by sleep you mean standby, then you should be able to do that. In the bios, you should be able to select the suspend mode. Chose s3 rather than s1. s1 leaves the fans on, s3 turns them off.
 

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RELEVANCY SCORE 73.2

Tech Support Guy System Info Utility version 1.0.0.4

OS Version: Microsoft Windows 10 Pro, 64 bit

Processor: AMD ATHLON II X2 CPU 235e 2.7 GHz

RAM: 6 GB , DDR2

Graphics Card: ON MOTHERBOARD

Hard Drives: C: 1.0 TB WESTERN DIGITAL BLUE LABEL, REPLACED 3 YRS AGO

Motherboard: UNKNOWN, MADE IN CHINA

Antivirus: Norton 360, Enabled and Updated
=========================================================================
COMPUTER FANS WILL TURN ON, BUT NO POST.
No LED Lights. Screen is Black, No Video at all.
When I push the Power Button, it will NOT TURN OFF.
I HAVE TO UN-PLUG THE POWER CORD TO THE COMPUTER ON BACK
TO MAKE IT TURN OFF.
I HAVE CHANGED OUT 2 MEMORY STICKS AT A TIME, PUT NO CHANGE.

I HAVE TAKEN THE HARD DRIVE OUT, AND IT BOOTS UP AND WORKS ON OTHER COMPUTER.

PLEASE ADVISE. THANKS
 

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RELEVANCY SCORE 73.2

Jumping into this conversation mainly to see the outcome. I literally have run into the same issue this week with my Lenovo E93z All-in-One. The system was running fine on Sunday. Would not wake from "sleep" mode on Monday. Performed a hard shut-down and attempted to reboot. I can hear the fan and the power light indicator turns on (full green), but nothing beyond that. I moved it to another location for easier trouble-shooting and when I plugged it back in, the power turns on by itself (without pressing the power button), but won't boot. I have limited ability in hardware trouble-shooting, but would replace the power supply if I knew for sure that was the issue.
 

A:Computer Fans Will Turn on But No POST

Pie2301 said:





I have limited ability in hardware trouble-shooting, but would replace the power supply if I knew for sure that was the issue.Click to expand...

If you are down to just the motherboard and PSU connected to each other and a monitor connected to the motherboard's video output, there is no easy way to tell if the failure is in the motherboard or the PSU without test equipment or swapping a motherboard or PSU.

I have requested a moderator move this to a new thread.
 

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RELEVANCY SCORE 73.2

So I've looked around for possible solutions to my problem.

My problem is I turn on my PC and I see a green led for my Motherboard power. The fans spin for just a second then stop, and no boot.

I've disconnected every component except the heatsink, cpu and fan.

I've tried resetting the CMOS by changing the jumper settings. No good.

I've tried switching the memory around. Nothing.

I've now taken the motherboard battery out and will re-insert it after this post is finished.

If that doesn't work I fear I'm running out of options.

I tried the PSU in another PC and it was fine. So I know it's not the PSU. I tried the OTHER PCs ORIGINAL PSU and that did gave the same problem.

I've read up on a couple of articles about shorting out the motherboard or power supply or something as a solution.

Is this true? It sounds more destructive than creative.

If anyone has any advice or suggestions I would really appreciate it.

This PC is extremely new. Literally half a year old. It has a BFG 850w PSU, an ASUS M8 Motherboard w/ an Athlon Dual Core Phenom 3.2GHz

It has built in SLI with two Nvidia GTX 260s

Two 1gb HDDs

it has about 5 fans including two graphics card fans.

it has 4gb of DDR2 ram.

PLEASE HELP
 

A:PC Powers on but no boot. Fans turn off after a second

Did this rig ever work?
 

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RELEVANCY SCORE 73.2

This is driving me crazy. I've been out of IT for a few years now and I guess I'm a little rusty. The motherboard on my media center computer fried so I decided to upgrade everything while I was at it. I got an Intel DH55HC mobo/i5 processor with an Antec 650w 'true power new' power supply, 4GB RAM and put it all back in my old case.

After everything was installed I powered it up, the fans kicked on for about a 3 seconds and turned off. After about 5 seconds the fans kicked on. This cycle keeps going until I power it off. I get no error beeps and no video.

My first thought was a bad mobo so I exchanged it and installed everything again. Same thing happened. Second thought was the power supply so I exchanged that - same thing happened.

I tried a power supply out of another computer on the new mobo and the same thing happened. I tried the power supply in another computer and it booted fine.

Could it be a mobo/psu compatibility problem or possibly the processor?
 

A:New build won't boot, fans turn on and off

I had the processor tested and it was indeed bad. 4 trips to Fry's Electronics (4 too many) and the machine is up and running now.
 

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RELEVANCY SCORE 73.2

It seems like every time the cpu goes past 50c, the cpu turns on to full blast for 5 seconds than cools down again. Theres no reason for that, the fans should stay on low every time. This is just when having multiple tabs open in chrome, its very distracting. It just goes from 0 to 100. No ramping up the fan speed. Is there any remedy for this? Changing the thermal paste? This is a brand new machine.  

A:Lenovo y700p Fans Turn to Max Way too often

Excuse me i mean y7000p

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RELEVANCY SCORE 73.2

This is on my old PC and im trying to fix it but im not sure if the mobo is no good or the psu or what. The PC can power on as well as the fans but maybe 5-10 seconds later the fans turn off and there is no display on the screen but the PSU fan is still going.

AMD Pheonom X4 9550 Quad Core
Nvidia 9100
6 gb ram
64 bit

A:PC Fans Turn On Then OFF No Screen Display.

Have you checked to see if the Ram sticks are pushed in all the way?

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RELEVANCY SCORE 73.2

My computer recently refused to turn on. It had been working perfectly the evening before. I could not smell anything burning or hear anything irregular.

On the advice of Corsair, I bridged a green and black wire on the PSU's 24-pin connector to test whether it was at fault. Upon turning the PSU on with the two wires bridged, the fan began to rotate. So either this is not to blame, or the PSU only partially functions.

I cannot figure out what component is at fault, and replacing parts would be quite an expensive guessing game. The Corsair PSU has a 5 year warranty; however, they require me to mail it to California. Being in Australia, this is quite inconvenient and I would rather fork out for a new one. My motherboard, I assume, is out of warranty.

My specifications are as follows:
Gigabyte P35-DS3P Motherboard
Corsair HX-620 PSU
4xCorsair DDR2 6400C4 (4Gb)
Gigabyte 8800GTS 512Mb (G92)
Antec P182 Tower
Intel E6750 Core2Duo 2.66Ghz
Asus 1814BL 18xDVD+-RW IDE
Western Digital 320G SATAII 7200 rpm HDD(Primary)
Seagate 250Gb SATAII 7200 rpm HDD(Secondary)

I purchased/built it on the 19th of December in 2007

Thank you for any assistance.
 

A:Computer will not turn on - no fans, lights or anything in between.

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RELEVANCY SCORE 73.2

My computer just recently crashed while I was playing a DVD. It had been running fine for about 1.5 years, except for the occasional BSoD (kernel inpage error) in the past couple of months after I had been playing Wolfenstein Enemy Territory for extended periods of time. This time, however, it wasn't a kernel inpage error, but something else. I didn't catch it, as it flashed pretty quickly. My computer proceeded to reboot, but then it froze. I turned the computer off, and when I tried turning it back on again, nothing happened. No lights, nothing. BUT the CPU fan and the case fans were still running, and the only way I could get these to stop was to unplug the power.

I'm about to go borrow a stick of ram from a friend to see if that's the problem. Does anyone have any other ideas as to what could be wrong? Thanks in advance.
 

A:Computer won't turn on but fans running

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RELEVANCY SCORE 73.2

So I built a budget gaming computer one and a half months ago and everything was working fine until 2 days ago. Initially, the computer ran Civ V and Shogun 2 just fine.

AMD X4 760K
MSI A78M-E35 FM2+
EVGA 896-P3-1264-A3 GeForce GTX 260
Kingston HyperX 8GB 240-Pin DDR3
CORSAIR CX series CX500 500W
Windows 7 Pro x64

But 2 days ago, I noticed while I was playing Civ V, the computer would suddenly reset to the bios screen and restart. This happened when I played any graphically demanding game, but not during normal use.

1 day ago, the computer started resetting itself to the bios screen during regular web browsing (no gaming), and when it was idling.

Today, I took the graphics card out and it booted (but I couldn't tell what was going on, because I don't have integrated graphics). I put the graphics card back in and it didn't turn on. I took the graphics card back out, and the computer still won't turn on. Now when I press the power button, the fans turn on and off, but the computer doesn't boot. No beeping.

My guess here is the power supply went bad. But I'm more worried if the motherboard is fried. Is there a way I can test? I don't have another computer (aside from this linux laptop I am on right now), or any spare PC parts. What can I do?

Thanks
 

A:Computer won't boot at all (fans turn on and off)

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RELEVANCY SCORE 72.8

I built a PC about 4 months ago, and I noticed that sometimes it takes up to 30 tries to get the PC to turn on. If I push the power buttom, some lights will come on, but unless the CD-ROM light flashes, the system will not display video or boot. Then I just try again and it works after a few attempts.

Any ideas what could be causing this?

Here are my systems specs:

Intel Celeron 733MHz
256MB PC100 RAM
30GB WD HDD
Voodoo4 AGP 32MB
Intel 10/100 NIC
ActionTek MB w/ Sound
 

A:PC Will not turn on half the time

try reseating your ram card
 

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RELEVANCY SCORE 72.4

I'm definitely not an expert but I have general knowlege from building a couple systems. My current system is the following (I apologize if some details are left out, I'm currently at work)

OS: Windows XP
Chip: Intel P4
MB: Asus P4P800 (865 PE)
RAM: I forget - 2 sticks of Kingston = 1gb
HD: 2 SATA
Video: Nvidia 5600 AGP (running 2 monitors)
PSU: Generic from Fry's 400w

I was listening to some streaming music and left the room for a couple minutes and came back my computer had shut down. When I got closer I could hear the system trying to boot, the fans would spin but it would shut down every 2-3 seconds. I switched the power off from the PSU.

I bought a replacement 500w PSU from Fry's figuring it went bad. I installed the new PSU but the system would not boot. THe fans would come on and a light on the MB was on but nothing. My monitors weren't receiving a signal either.

I then thought maybe it was the video card and went and bought a Nvidia 6800 AGP but still nothing.

I read online and tried a few other things:
- Removed the onboard battery on the MB and reseting the CMOS using jumpers
- Removed all PCI components including video card and tried booting and then installing only the video card and rebooting.
- Removed one stick of RAM
- Removed hard drives

At this point I think it might be the MB or just another bad power supply. Any other suggestions?

Thanks in advance.
 

A:Old Computer: Fans turn on but system won't boot

Remove the CPU heatsink/fan and check for thermal past. Clean of the old paste and apply new
 

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RELEVANCY SCORE 72.4

I just recieved my new Dell XPS. I have one thing that I would like to change and can't seem to find out how to do it. When I enter standby, the computer shuts down but the cooling fan(s) continue to run. When I bought my Dell 8100 three years ago it was the same way, but the issue was fixed when I upgraded to XP Pro. Now, with the XPS and XP pro the fan(s) continue to run while in standby. There must be a way to control this. Maybe through the bios? Any help would be great.
 

A:How to turn off power supply fans while in standby?

Look at APM in the BIOS.
 

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RELEVANCY SCORE 72.4

Hello, the cooling fans of my IdeaPad laptop turn on and off very frequently (even if the laptop is almost idle - let's say when I'm just viewing a page in Chrome without performing any activity like clicking or typing). They usually run for about 30 secs or so and after that they turn off and no noise from anything is audible. But after another 30 secs they turn on again and that cycle repeats all the time. I did a search on the net and found a potential solution to the problem here. But after updating the power settings as suggested nothing changed (I restarted the machine). On the other hand, I didn't find any options about that in BIOS. Is there any way to control the cooling fans, because it's kind of bothering to hear them turn on and off all the time?

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RELEVANCY SCORE 72.4

Please Help me with this,
One day I get home, turn on my computer, it comes on... checking email...alls fine, then my computer just turns off... click the on button...loading... screen comes up...bam....off again! Not even any error messages! I continued like this for about 10-15 minutes untill now I only get it up for about .7 seconds and nothing appears on the screen.

Now,
1. I have the power supply, fine.
2. I have checked all peripherals, fine.
3. I have checked the video card and RAM on different computers, fine.
4. I have continually cried, fin... never mind...
5. I checked the Hard drives, mointor, all other drives, FINE!

My system specs are as follows:
| AMD Athlon 64 3200+ |)
| Gigabyte GA K8NS |)
| Apollo Geforce FX5500 256MB DDR |)
| 3 x Corsair 256GB DDRAM |)
| Western Digital 250GB ATA IDE HDD |)

Thanks in forward for any help or ideas, but one thing that I could use is howto test to see if you motherboard is damage.

Thanks even more!
 

A:PLEASE HELP, computer won't turn on, fans come on and lights blink

Have you checked that your fans are spinning up? Is the heatsink sitting flush with the CPU? Have you made any changes to your hardware on the mobo?
 

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RELEVANCY SCORE 72.4

In which of the ACPI power states on a desktop computer are the CPU/PSU fans on?

I guess in S0 all fans are ON. In what of the other states are fans off?
..................................................................................................................
Wikipedia: Advanced Configuration and Power Interface:

? G0 (S0): Working. "Awaymode" is a subset of S0, where monitor is off but background tasks are running.
? G1, Sleeping subdivides into the four states S1 through S4:
o S1: All processor caches are flushed, and the CPU(s) stops executing instructions. Power to the CPU(s) and RAM is maintained; devices that do not indicate they must remain on may be powered down.
o S2: CPU powered off. Dirty cache is flushed to RAM.
o S3: Commonly referred to as Standby, Sleep, or Suspend to RAM (STR). RAM remains powered
o S4: Hibernation or Suspend to Disk. All content of main memory is saved to non-volatile memory such as a hard drive, and is powered down.
? G2 (S5), Soft Off: G2/S5 is almost the same as G3 Mechanical Off, except that the PSU still supplies power, at a minimum, to the power button to allow return to S0. A full reboot is required. No previous content is retained. Other components may remain powered so the computer can "wake" on input from the keyboard, clock, modem, LAN, or USB device.
? G3, Mechanical Off: The computer's power has been totally removed via a mechanical switch (as on the rear of a PSU). The power cord can b... Read more

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RELEVANCY SCORE 72

i just built this computer, It will not turn on at all...Only time it shows any life is when i turn off the power completely and try to turn it on which it will flicker just like half a second on the PSU..

I just ruled out the PSU because i just bought a new one to check if that was it and did the same thing...(i returned back)

Im still lost tho...

My computer is this
-ASUS M4A87TD EVO AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard
-AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz Socket AM3 125W Six-Core Desktop Processor HDT90ZFBGRBOX
-SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
-GIGABYTE GV-R465OC-1GI Radeon HD 4650 1GB 128-bit GDDR2 PCI Express 2.0 x16 HDCP Ready Video Card
-CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ8GX3M2A1600C9B
-Rosewill Stallion Series RD500-2SB 500W ATX12V v2.2 Power Supply

The front panel cords are in there right spot. I dont think its the PSU because of me checking it with a new one.

Please does anyone have any advice on where to go from here...All Parts are brand new other then my dvd-r drive.
 

A:PSU flickers for half sec and doesn't turn on

Is the motherboard shorting against the case/motherboard tray? Did you use motherboard standoffs and if so, none of them are improperly installed or misaligned in the wrong place? It does sound like you left them out.
 

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RELEVANCY SCORE 71.6

I have an HP media center PC running x64 Vista, when I usually put the PC in sleep mode (I'm assuming s3?) the case fans, PS fans and CPU fan would all cut off, now they do not. I have been reading and scanning forums all day on the subject and find no fixes. The closest thing I can come to is a registry setting? There are no power management options in BIOS(the BIOS is the most recent release, I checked).

Any suggestions appreciated!
JC Carmichael

A:Motherboard fans won't turn off in sleep mode anymore.

Fans won't cut off as in woon't turn off or keep on going? Have you tried flashing the BIOS?

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RELEVANCY SCORE 71.6

Hi, I would firstly like to apologize for not being able to update my user CP or tell you what my CPU/Mobo is. I can't get my computer to turn on and can't access the info.

This happened while I was trying to reset everything on my computer (because there was a problem with my NIC). I unplugged everything and replugged them into their respective places, and now I can't seem to turn my computer on. Everything was working fine (except the NIC) prior to my resetting. Now the problem is when I turn on the power, there would be a small delay before it would turn on, and when it does turn on, the lights in front of the computer (for the on switch) flash, the flashing intervals are synchronized with the rate the CPU fan turns on and off. The case fan is running constantly however and it is blowing out cool air. I have done some searching on the forums, and I have heard that it was because I unplugged the 12-20 wire that connects the power button (in the front) to the CPU. I unplugged this wire and the fans still turn on and off, except the front LED's can't flash. If anyone can help me, that would be most appreciated.
 

A:Lights flash, fans turn on and off, comp remains off.

You gotta do some more diagnostics.
But before I'll start listing them, I have one question:
Before you've removed components from your computer did you un-plug it from AC outlet? Cause if you didn't you may've damaged motherboard or any other component for that matter. I know it sounds silly but I'm just making sure.
Anyway, do as follows:
Unplug the power. Open the case and re-sit you memory modules and if you have to re-sit your CPU chip. Re-sit all your add-on cards (sound, video etc.) Make sure you re-install the CPU heatsink properly. Make sure that all cards and modules are snug and properly sitted in the motherboard.
Note! Dont' ever operate your CPU without properly installed heatsink, ever!
Plug it back in and the try to boot. If it's still no go:
Unplug it. Pull all the cards out except for the video card. Disconnect all your drives: hard drives, cd/dvd-rom/rw drives, floppy drive(s) etc. Actually disconnect everything from you motherboard except for: CPU, 1 memory module and video card (and of course power supply - make sure the 12V+ cpu plug is in the motherboard!). Plug in and power on. See what happens. If it's still no go move the memory module to a different slot; power on; still no go - pull the video card out: plug-in power on; still no go:
- Your power supply, motherboard, memory module or CPU has gone bad - you gotta swap them out with differnt component to test if this fixes the problem; star... Read more

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RELEVANCY SCORE 71.6

I've had my inspiron 15 7567 for little over half a year and have already had several major problems with it, all of which have been able to fix myself up until now.
When the laptop enters sleep mode(either by closing the laptop, or entering it manually) the fans kick on at full speeds, and remain on until i open the laptop again. I have also found that the fans will do the same thing even if my laptop is completely shut down, as long as it is plugged in.
Any help or suggestions would be appreciated, thanks.

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RELEVANCY SCORE 71.6

Hi all,
I've got an Asus ROG G752VL-DH71 here and the fans have suddenly switched to 100% - though the temp of everything seems quite fine (hottest is 51 degrees, gpu) and the CPU usage is at 8% average, disk usage no more than 20%.. I cannot find out why these fans are on 100%, so loud, and why I'm unable to change this!!

Someone please help

A:Asus ROG G752VL-DH71 - Loud fans won't turn off or down

What are your CPU temps? Use a CPU Temp monitoring program like Core Temp or Real Temp to monitor your CPU temps. Also, are you sure it is your CPU fan or the GPU fans? Please follow these suggestions to give us the info we may need to help you.

Please fill out your System Specs
   Information
Your System Specs will help us to help you, and doing it in this manner will make them available to all helpers in every post and keep us from hunting for them. We ask that you fill them out in as much detail as possible including Desktop or Laptop, Model number if it is an OEM computer and all components with the Manufacturer and Model number if possible. If you will go to your last post and click the 'System Specs' in the bottom left of the post, you will find a link to update your system specs. Please fill those out in as much detail as possible, making sure to click save at the bottom of the page. If you would like to know what we would like, you can click 'My System Specs' at the bottom left of this post to see mine. If you do not know what your components are, this will help you accomplish this task. System Specs - Fill in at Ten Forums

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RELEVANCY SCORE 70.8

When I Exit Speedfan,my Cpu And Hd Fans Just Go On At Highspeeds And Dont Go Off Until I Go Bak To Speed Fan And Turn It Down Manually.....how Do I Just Get Rid Of Speedfan And Make My Computer How It Used To Be?
 

A:Solved: Everytime I Turn Off Speed Fan,my Computer Runs The Fans At 100%,how Do I Fix This?

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RELEVANCY SCORE 70.8

I have two E73 desktop towers acting the same. Windows 7, 32 bit. Machine type model for both: 10AS002JUS There is no video at all from either VGA or DisplayPort.The fans turn on, there is no beeping -- unless I remove the RAM stick.Keyboard and mouse are not powered on in any of the USB 2 or USB 3 ports. Here's what I've tried on both:- we swapped known good PSUs into both- put the CMOS jumper into reset position, even pulled CMOS battery- unplugged every device from the board- swapped ram sticks, swapped ram locations- Flash UEFI BIOS (FCKT94A from 2019-07-23) on CD in optical drive with jumper in reset position and hard drive disconnected. The drive opens but automatically closes after a second or two. Once in there the CD spins up but nothing else happens.- powered off for months on end- disconnected front USB and audio ports- reset every single connector on the motherboard I've tried a variety of combinations of the above but would try a specific combination if someone thought it might help.Any further ideas?

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RELEVANCY SCORE 70.8

Hello,

I have upgraded to Windows 7 x64 from Windows XP. With Windows XP, shutdown/reboot/sleep were working perfectly fine but now with Windows 7 x64 the PC refuses to shutdown completely. The fans/LED/CPU remain on. Same thing if I chose to sleep the computer. I need to press the power button for 4 seconds to completely shutdown the PC. I've tried:

- A clean boot;
- Deactivating all non essential services;
- Looking into devices power management tabs and deactivated accordingly what was needed;
- A Safe Boot;
- Reverting certain drivers to older versions (network card, GPU);
- Resetting bios. The Bios is up-to-date;
- Doing a sfc /scannow.

None of the above changed a thing. The outcome is always the same. The only difference with a Safe Boot is that the shutdown process hangs at the "Shutting Down..." window and therefore I need to hard reset the computer as well. Windows 7 is fully up-to-date.

In order to eliminate possible hardware issues I booted the PC with a backup drive of my old installation of Windows XP. Shutdown works perfectly. So it does not seem to be hardware related.

I have made a Shutdown Trace that can be found here. Could any expert have a look at it and tell me if he notices anything out of the ordinary?

Thank you.

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RELEVANCY SCORE 70.8

So yesterday I opened my laptop to install a new memory module to increase a total amount of RAM.After I opened the case, I just wanted to check if its working or not (before installing new RAM).The laptop didn't start.It's giving no visual feedback, no LEDs, only when I press and hold the power button, fans start and stops after 10seconds.I tried removing the battery and powering on the laptop directly with the adapter. As soon as I connect the adapter fans start automatically and keep spinning until I press and hold the power button.I am getting no feedback from the laptop so I am clueless on what to do now! Need help!

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RELEVANCY SCORE 70.8

I have had this desktop for quite some time now but i don't just want to give up on it without trying to see if i could make it work again because it has on tons of songs and pictures.
Anyway the fans started acting up and every time i turned it on it had a high revving sound. Soon after the fans stopped working and when i press the power button it failed to power up. I allowed months to pass i just connected it to the power again and the orange/amber light came on flashing for about 5 minutes then it disappeared for good. What could be the problem? Do I just throw it out or it could be fixed?
 

A:Dell Dimension 3000 fans stopped working PC won't turn on

I've seen this on a few Dells in the past. First thing to check is the power supply.
 

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RELEVANCY SCORE 70.8

The fans on my video card work fine in UEFI & Ubuntu but when I load windows they turn off upon the windows login screen loading

They also seem to stutter a little like they're trying to turn back on but never do. This is only an issue when running windows and wasn't a problem the other day, but I think there were a bunch of updates that installed since then.

What could cause this and how do I fix it?

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RELEVANCY SCORE 70

i have tried plugging it in, holding the power button, and i tried taking off the back to remove to battery or ram, but the screws are unavle to be removed completely due to an internal stop. the laptop is only 1 week old, please help

A:Lenovo Thinkpad L390 Yoga will not turn on and fans spins constantly

Hi tatumhedrick! Welcome to our forums community.
 
Do you hear the fan when you hit the power button? If yes, try connecting the laptop to an external monitor to check if the issue is the same or you can try booting to BIOS and see if the issue is the same. The instruction is here: https://support.lenovo.com/us/en/solutions/ht500222
 
Are you having this issue when you first got the computer? If yes, if it's purchased from Lenovo, please call our support: https://pcsupport.lenovo.com/us/en/SupportPhoneList for further assistance. If it's from a reseller, you can have it replaced by the store.

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RELEVANCY SCORE 69.6

Unfortunately, I got home last night, and it wouldn't turn on.  Fine; I figured that maybe the battery was dead.  Plugged it in, and still no joy, but hey, I figured maybe it wouldn't start until it hit a certain minimum charge level (a la many smartphones).  So I left it charging overnight, packed it when I went to work this morning, got here, and... it still won't start. Indicators/symptoms: The only I/O that appears to be working is the charge indicator (the small circular light next to the power button) and the power button light. If I plug in the power, the small circular light stays on (white) until I unplug it. Plugging in the power also sometimes causes the power light to turn on (again, white), and it will stay on (regardless of whether it's plugged in) until I force power-off via holding the power button. Nothing else works/responds.  The fans do not turn on, the caps lock light does not light up, the keyboard backlight can not be turned on.  Nothing.  As far as I can tell, the computer isn't even on -- only the power light.  I have tried every hotkey (and other key) on the keyboard. Disconnecting the battery didn't help either. Waited one hour on the line to talk with someone in Lenovo but after being transfered 3 times and each person asking exactly the same questions I gave up! very poor customer service!  Brought it to Lenovo certified repair center and they chose the simplest solution of repl... Read more

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RELEVANCY SCORE 69.2

Hello I have quite a frustrating problem, last week on my last PC I was having problems with it slowing down in games even though it was more than fast enough to handle them, after trying to trouble shoot it, my screen randomly went black after I restarted it the front LEDs wouldn't turn on, my keyboard and mouse would not light up and the screen was black, though all fans would turn on, so I started to trouble shoot, I bought a new PSU, I tested my GPU in my roommates computer. And I replaced the ram with my roommates ram, I posted on other forums and they said it was likely my mobo or CPU, so I went ahead and used it as an excuse to upgrade, I bought a new core i5 4690k CPU and an MSI z87 mobo, put everything together and still the exact same problem. The only components I haven't replaced are the fans and my computer case / power button and audio/USB jacks. I don't know what to do now, could it be that there is something wrong with my power button coming from the case that is causing all this? (Note the front LEDs flash for a split second when I turn the PC on or off)
 

A:Solved: brand new PC won't turn on, fans start but no front LEDs or signal to monitor

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RELEVANCY SCORE 69.2

My problem is actually similar to the following:
http://forums.techguy.org/hardware/730934-dimension-4700-light-flickering.html
This thread however had no responses.

I know a little more about my problem and hope it can be solved here.. Sorry for making this post so long, but this problem is a real bugger and I'm giving all the info I can.

The problem: When the computer doesn't start
When I plug in the computer, pressing the power button does nothing. This problem is aggravated in winters (weird but true) and when the D-Link ethernet card is plugged in (whichever slot).

When it does start:
In summers, I leave it powered for sometimes, say 20 min.
Gradually the power light on cabinet starts blinking rapidly (on pressing the power button).. a little later the HDD lights also start blinking. The CPU fan turns in jerks and in sync with these lights. A little later, the computer boots normally and works fine after that.
Also, operating it increases the temperature, and subsequently the computer can be made to start without problems.. till it cools down or I disconnect mains.

How I have to start it when it doesn't:
In winters, the above procedure doesn't work. Then I can try one of two things (I usually avoid turning the comp at all, use my laptop instead, since I don't like either method)
I can point a hairdryer from a safe distance at the motherboard, and keep the power button pressed. It starts in a little while.
OR, this is possibly a worse method..... Read more

A:Computer startup problem: power light flickers, fans turn in jerks

Have you replaced the BIOS battery? after 5 years its is most likely dead or nearly dead by now. Get your multimeter on it and check it's voltage (my money is on this)
Have you tested the CPU fan to see if it spins up OK, test on another PC if you have one?
Have you tried booting up to just the POST with NO drives connected with power?
Tried another PSU? Does this PSU work OK in another PC?
 

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