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

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

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 itself . I had not pushed the power button yet. All of the fans turned on, and the light on the front that turns on if the computer is processing something turned on, but it was not as if the computer was processing something. If the computer is processing something, it flickers and clicks a little. This was just a solid light with no "clicking." I pushed the power button, but it didn't turn blue as it usually does if it turns on. In fact, nothing changed. After about a minute and a half, the entire unit shut down again, and I was not able to get it to do the same thing again. When I tried unplugging it and plugging it in again, I could hear the unit try to start up again for a second, but it would fail again.

Last night, I opened it up to clean out the dust (I figured that could be an issue with overheating despite the fans). I basically took it apart and put it back together again to no avail. I did find one loose wire in the power supply unit. When I plugged it in, it would turn on (lights and fans, but not the computer itself) as it did earlier in the day, but nothing new happened. I noticed that a red light would go on when the computer was "running," but it would go off as soon as everything else turned off. A similar green light would stay on when the computer was plugged in no matter what I did. The power supply unit was no longer hot. The entire unit except for the green light would shut down after about a minute.

This morning, I tried to get it to work again, and it was doing the same thing as it was last night.

I bought it about 3 years ago when it was being phased out, and I was planning on getting a new computer soon anyway, so it's not a big deal if it's too serious. I'd probably try to fix it if I could do so for under $100. Otherwise, I'll probably get a new one. I didn't really have anything important that I hadn't backed up on there, but I'd like to save the hard drive if I could. I'm a novice when it comes to hardware, so I'd be a little nervous about replacing major components (I've installed RAM and that's about it until last night).

So, the three big questions:

1. What's wrong?
2. How can I fix it?
3. Is it worth fixing?

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

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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.

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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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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


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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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.

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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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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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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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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Power LED Lights in my laptop are not getting turned on when I connect my Laptop to an power outlet I have tried thesea) Replaced the AC Power adapter b) Removing the batter and connected the Power adapter to an poweroutletc) Did a hard reset by pressing the power button for more than 60 seconds But in none of these scenarios my power led lights doesn't turn on. What might be the issue here?

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I have a Toshiba P50-A that I took apart to dust off the cooler and replace the thermal paste on. Now there's no lights turning on on it, even when plugged in, and it does nothing when the power button is pressed.
Things I've tried:

1. Reseating RAM
2. Taking out battery and power and holding down power button for 2 minutes, then reconnecting power and trying to boot.
Any ideas?

A:No Lights on Laptop and Doesn't Turn On

Are you sure when you were working on the machine that you didn't unplug any internal cabling inadvertently? It's definitely worth re-opening the case and taking a look.

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i'm coming from Dell and i'm used to keyboard backlight turns off automaticlly if it's not used for 10 seconds.is there's anyway to enable this in Ideapad L340 Gaming?Thanks in advance.

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I just put together my first computer 6 months ago. It abruply shutdow in the middle of writing a paper for school. I couldn't turn it back on right away. after trying a few times, it turned on. All the fans are working even the fan on the power supply, the motherboards lights are on. My graphic card in on the motherboard. I think it might be my power supply because when I first put it together I didn't plug in the smaller power connection to the motherboard and the same thing is happening, black screen. It's like my computer isn't giving my monitor any feed. I will have more info when I get home. I can't get in to bios or safe mode.

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One night, a couple months ago, I was trying to play a game with a friend when my computer just turned off. It wouldn't turn back on. The next day I was able to get it to come back on and it had some boot message, but I didn't have time to read it before it booted. It was on but wouldn't charge. I turned it off to conserve battery a couple more times before it was permanently dead.I have tried hard reset, but I get absolutely no reaction from my computer.I have replace the internal DC power adapter, but the computer stills doesn't respond (also retried hard reset). So the motherboard should be getting power, but my computer doesn't turn on, charge, or blink. It worked initially after dying, so why doesn't it work now?What kind of options do I have? I would love to send it in to HP to repair (as long as it doesn't cost more than $400), but I have had any luck contacting HP support yet.My computer is out of warranty.

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***Warning: I'm very, very tech unsavvy*** Example: I put a large game disc in the player yesterday, it recognized there was a cd in there, for instance, after much work and time on behalf of the computer, but although it's a game with hundreds of files and hundreds of megabytes on it, it registered one media track 40-something bytes only. Nothing else. That's the kind of thing I get if I'm lucky enough to have it recognize anything there at all, lately. Mostly, it doesn't recognize them at all anymore. As a matter of fact, part of its erratic behavior is that half the time, if there's a cd or dvd in the drive when the computer is turned on, it gets stuck on startup before the user account screen pops up and won't go anywhere unless I open the tray up. It's driving me crazy. Do I have a bad drive or is the drive okay and there's something wrong with some software somewhere? What say you, to the noob?

A:[SOLVED] CD/DVD drive, lights turn on, makes noise, tries... but doesn't recognize!

Hi and welcome to TSF try the info here How to troubleshoot common problems that occur when a Windows XP-based computer cannot read a CD or a DVD

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My T440 wouldn't turn on when the external battery is in place, also the F1 and F4 keyboard lights stay on. When I removed the external battery and used only the internal battery, I noticed the green power button was blinking rapidly and it wasn't charging when I plugged in the charger. While on only internal battery, I later had to power off and power on the laptop every time I want it to charge and stop the power button from blinking. hhh    I have this question too  

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I use to have my HP6900 series printer hooked up with a USB cable from the computer to the printer. The printer could be off and if sent a print command it would turn on, and print. I recently hooked it up with a network cable off the modem/router so that I could also print from some laptops. Well, it no longer wakes up and prints. I have to turn the printer on, and then send the print job. I have looked in the printer setup and see nothing that would correct this.

Any ideas?


A:HP printer doesn't turn on automatically

Model number of Printer? Such as, HP Deskjet 6940.


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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.

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 ... Read more

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I recently had to take my computer in to be fixed only to find out my GPU was fried but the guy there was going to way overcharge me to install a new GPU so I decided to do it myself as I have done so before. So I got a new video card, I installed it, I clicked the power button and the cpu fan spins for half a second and then nothing. I called the computer guy and he said when he had it there it was working fine with other video cards and would start up fine. So now I don't want to pay him yet again to try to figure out why it won't even turn on. I've try reseating the memory, reseating the GPU. The lights on the motherboard and the lights for the power inputs to my GPU are on and yet it still won't start. I don't know what to do next. I hope one of you fine people here can help

My specs in case it matters:
CPU: AMD FX-8350
PSU: 750W

A:Computer won't turn on but motherboard and GPU lights are on

What's the brand name and complete model number and revision number of the motherboard?

What's the brand name and complete model number of the 750W power supply?


Your "computer guy" doesn't sound like he's very reliable.

We have no way of knowing what he did to your computer and why it won't start and load Windows.

Be patient and wait for one of the hardware experts here to reply.


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Was troubleshooting a computer that won't start

Computer worked perfectly fine, underwent an update, and inexplicably crashed. Trying to turn it on won't so much as hint at a flicker of any light whatsoever on a motherboard, or screen, or even make a sound from a fan, or turn a fan on, etc. Absolutely dead.

Tried a brand new PSU to no avail. Disconnected previous one, and connected new one exactly as the previous one had been connected. Flipped the switch in the back of the new PSU to 'On', and tried the 'On' button on the case. No peripherals were attached whatsoever at any time. No joy.

Under these circumstances, would the problem most likely lie in a tossed-out motherboard, or CPU, and why? I imagine these could be the only two culprits, unless a bad CPU fan could be a candidate? A fun note: this is a refurbished computer (I wonder why those are a bad idea?)

*Added* It was the windows 8.1 update that the crash happened under (but not necessarily caused by), and the computer is a Gateway DX4870 that had 8 installed already. This should be it: Newegg.com - Refurbished: Gateway DX Series DX4870-UB2B (DT.GEEAA.002) Desktop PC Intel Core i3 3240 (3.40GHz) 6GB DDR3 1TB HDD Capacity Windows 8 64-Bit

Thanks for any help!

A:computer wont turn on, no lights, no life

what kind of update software or hardware ,and some info on the computers specs

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Power button turns on but computer won't turn on. Black screen only

A:power button lights up but computer won't turn on

Me, too so I anxiously await a clue or two!!

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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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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?


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

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Tech Support Guy System Info Utility version

OS Version: Microsoft Windows 10 Pro, 64 bit

Processor: AMD ATHLON II X2 CPU 235e 2.7 GHz

RAM: 6 GB , DDR2




Antivirus: Norton 360, Enabled and Updated
No LED Lights. Screen is Black, No Video at all.
When I push the Power Button, it will NOT TURN OFF.



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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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Hey guys. I'm just trying to help out a friend. I think I know what the problem is but I just wanted to get a second opinion, and maybe a third and a fourth. I think the problem is the power supply but before I send this poor college student out to buy a new one I just wanted to make sure.

Any way, she has an old Packard Bell running with a Pentium 200MMX . It's an AT power supply. What happened is she turns the machine on and the power light blinks on, the cpu fan spins for about a half sec. and then nothing. No power, no beep codes. So, she brought it over, I plugged my cord into it and the same problem. I checked all connections in the computer and everything looks ok. Then, I disconnected the power supply from the motherboard and then connected it. Plugged it in with the same cord and the machine turned on with no problem. Booted up to Windows and everything. Even let it run and checked out some basic programs to make sure nothing happened. I thought it was just a funny glitch (keep in mind that no one has ever opened this machine since it was purchased) so I packed it up and sent her home with a extra power cord just in case. Of course I got a call and she was having the same problem. So, what's the verdict hardware guru's, power supply or serious problem?

[Edited by bcon76 on 06-04-2001 at 11:25 PM]

A:computer won't turn on, lights flash, no beep codes

Hi bcon76
It's hard to say what the problem is but I would try a new power supply first. AT power supplies are usually pretty cheap too. BOL

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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.


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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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
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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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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Problem description:
I built my computer in January 2008. When it is turned on, there is a blue light on the front panel next to the power button that burns steadily (Case is from Cooler Master).

Most nights I turn my computer off when I go to bed. Sometimes though I don't and leave it running all night. The longest I've ever had it on non-stop is probably about 72 hours. After about 30 minutes my monitor goes on standby and switches off. It wakes up and returns to desktop when I press a button or move the mouse.

Last night I kept it on. It had been off the previous night so it was probably now running for about 20 hours. When I returned to it this morning I moved the mouse and pressed some buttons and nothing happened.

I tried turning the monitor on and off but it remained on standby.
So I decided to restart the computer. I pressed the restart button on the front panel but nothing happened. I held down the main power button for 20 seconds and nothing happened. At this point I noticed that the blue light was flashing instead of steadily burning.
The only way I could turn it off was by turning off the psu power button at the back.

I can not get the POST screen to appear. In summary, I can not get my computer to boot up when I turn it on. I can only turn it off by disconnecting the power.

When I press the power button, the blue light flashes; and the numlock, capslock and third light on my keyboard flash as well. The monitor does not turn on and there are no beep... Read more

A:Computer can't POST, turn off - flashing power, keyboard lights

Do you have a multimeter or a friend that does so you can test the power supply?

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Hello Forum,

Summary: Weird burning smell for 2 or 3 boots --> Doesn't turn on, no sounds or lights from comp --> replaced power supply --> worked for a few boots --> back to completely nonresponsive state 15 mins later (details follow....)

I do not know the system specs and I can't find them out without posting this issue at this time. It may not be that necessary to know the details but I can find out soon if necessary. Let's just say it is NOT a new computer - the motherboard is large - I could tell you the model in a later post - the processor is 1.x GHz, something like 512 MB RAM, I have 2 HDs. I am running Win XP.

Old Power supply: Was pretty old, up to 10 years old but maybe a few years younger (300 or 350 W). I haven't seen the computer much for 3 years since I started using and it was upgraded in the meantime.

One day I turned on my computer and shortly afterwards the room started smelling like burning metal/rubber or something acridly foul. Opened the case and nothing seemed to be boiling or noticeably hot, though I didn't really touch around. The only thing that was reasonably warm was the P/S. I thought I noticed the smell coming from it but it was only slightly smellier in that area, at most. Didn't add anything special or change anything in comp recently beforehand. Played loud music on in the night before but the speakers have their own power supply.

So I decided to replace the P/S - I purchased an hec HP485D 485W ... Read more

A:Solved: Computer Won't Turn on, no lights, replaced power supply

It's extremely likey that when your PSU blew it damaged your mobo as well. If you have removed and replaced everything else and nothing works then it's either your mobo or cpu. In this case it's likely your mobo.

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After i cleaned my laptop fan, i put everything back together. Laptop turned on everything was ok. Next day i leaved my computer on and walked away, when i came back it was off, A/C cable was pluged in so i tried to turn it on, but it didn't and none of the lights doesn't turn on too. What could be the problem, and how can i fix it?

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I tried checking out the flex 4 fix, but the link to the driver doesn't work. I keep putting it in tablet mode to draw and use, but the dang thing doesn't turn off. Which can be very annoying when you're drawing with it in your lap and it keeps hitting random keys. Can someone tell me which of the stupid bloatware needs to be kept and uninstalled for this thing?

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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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Hi, I just bought the new apple TV, and I want to use it in the morning without getting out of bed, but the apple TV requires iTunes to be running and I need to shut my PC down overnight. So i need to turn my computer on at about 7:00. I cant find an option in the BIOS, which is Phoenix SecureCore. Im also dual booting Windows Vista and Ubuntu Lucid Lynx, so It cant be a software programme. If there is a turn on at.... on phoenix secure core please tell me if not, is there a way I can add this option to my BIOS. Putting my PC into hibernation is not an option.


A:Turn on computer automatically

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My problem is actually similar to the following:
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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Hi everyone,i have a trouble with my laptop, it auto turn off, then I cannot turn on, I have to wait around 15mins, then try to press turn on, so the laptop can start, but it only on around 45mins, then off again, I don't know what wrong with that, even I tried to hard reset it 

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I think I would like to do this for a few reasons. I would like to be able to just have it turn completely off if it hasn't been used in a few hours. Is there a way to do this?
Thank you.

A:Can I set my computer to automatically turn off after an hour or two of no use?

I find this piece of free software useful.You just set it for how long you want your computer to run and then it shuts down.


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Whenever I turn my computer on, I am automatically logged on....I have no clue why my computer is doing this, it never did it before....If anyone has any suggestions I'd appreciate it, but try to keep it simple, I'm practically in the dark ages when computer lingo starts flying . Thanks!!!!

A:automatically logged in when I turn my computer on

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Every time I turn my computer on, I am automatically logged on....My computer never used to do that....How can I fix it?

A:automatically logged in when I turn my computer on

Please don't duplicate post, reply here:


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hey guys i was wondering whether you can help me?

I want to shut my laptop down automatically at a certain point of the evening (i sumtimes fall asleep whilst watching dvds and find my self waking up to a laptop thats still on) Maybe about 4A.M.

was wondering whether this could be done through task schedular and if so how?

I work on a vista operating system

I will appreciate the help guys (and gyals)

A:turn off computer automatically: vista

Please refer to this article:

Happy zzzzzzzz's!

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Everytime I power on my modem, my computer will turn on automatically. Can anyone tell me why? Can I set it in Bios? or somewhere else?

Thank you

A:My modem turn my computer on automatically

There is either a setting in your bios or a there is a jumper setting on your mobo. Refer to your mobo manual, look for "wake on ring" setting and set it to off or disabled.

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Whenever i turn on my computer, it loads the desktop, then a few seconds after it has loaded, it automatically restarts

This happens in a repeated cycle

However, if i make it so the computer has a lot to load early on, such as clicking on firefox or media player a few times, it seems to load these programs, obviously very slowly, and then the computer does not restart itself. IS this something to do with the computer being too busy to "think" about restarting?

I searched the forums, and google, but none of the problems i found seemed to restart in the same circumstances, and they didnt say anything about loading programs early on

I have turned off "auto restart on system failiure", as this seems to be common in the restarting posts, but not tested what happens apon turning the computer on yet.
Also, if this is the problem, then i don't like the idea that my system is failing every time i turn it on.

Thank you for your time


A:My computer automatically restarts repeatedly when i turn it on

Hi .

Have you tried booting into safe mode, for comparative purposes?

If you can get into safe mode...have you tried using XP's system restore function?

Any recent program/hardware additions?


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I have a laptop running Windows XP. When I first turn on the computer my X-Cleaner program automatically starts loading and running. This is a nuisance to me as I would rather run it when I am ready to turn off my computer. I have read that if I go to the start up folder that is the place to remove programs that run automatically at start up. The problem is the program is not there. I also read that I need to go to the registry if I don't find it in start up. I don't know how to go to the registry and then how to do whatever I need to in order to change this from occurring. If anyone knows how, can you please let me know?

Thank you,


A:Program Automatically Starts When I Turn On Computer

Go to Start > Run > type "msconfig". Go to the "Startup" tab, and see if the program is there. If it is, uncheck it and apply!

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Is it possible to make a specific software that i have downloaded on my pc turn on automatically whenever my computer turns on without me having to do anything?

A:How to have a software turn on automatically when my computer turns on

You can add it to the starup programs. Here is how:

1. Make a shortcut of this program on the desktop.
2. Press Start and type shell:startup, then press Enter
3. Drag the shortcut of your program into the folder that just opened
4. Close the folder

With the next boot, that program will start automatically.

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My computer just suddenly shut down. There was no shut down screen, it just went black out.

After I reset my power generation. My computer doesn't turn on anymore. Only the monitor is the one can be turned on.

Could you please, tell me why is this happening?

So please, oh please, reply me back, and tell me what to do!

A:My Computer doesn't turn on

Sounds very much as though your power supply is the culprit.

Fault-finding flowchart here: PC Power Supply Failure Diagnostics - Computer ATX Power Supply Troubleshooting and Repair

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When I turn on my computer the monitor doesn't turn on, the light is green at first but then turns to orange and when the monitor did work this morning, the computer wasn't booting, it was stuck on a screen saying the RAM and stuff...The fan spins but nothing happens...
I have no idea what's wrong with it and there hasn't been anything new done to the computer. All the cables are in and where they should be.
What do I do?

A:Computer doesn't turn on

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Okay, so my desktop computer used to be on all the time and then all of a sudden it went off and it just simply is NOT turning on. Pressing the button to turn it on does absolutely nothing. I've tried leaving it unplugged for a week, and it still didn't work. There is a light on the motherboard so I know that the motherboard does have power but I can't figure out what's wrong. Can someone please help me turn this pc on?

A:Computer doesn't turn on

The problem sounds like the power supply, if not that, then the motherboard. A good way to narrow the problem down, would be to swap a known working power supply, and see if the computer boots up. If it doesn't, there is a problem with the motherboard (considering all wires and cord are connected properly and there are no other power issues such as AC outlet, surge protector, bad PSU power cable etc.)

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