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CPU light on fans on but won`t boot up ?

Q: CPU light on fans on but won`t boot up ?

Hi My freind gave me his old Gaming PC as he bought a new one the fans come on and stay on so do all the leds on the front panel however it wont do anything wont boot just shows black screen is there a way to fix this we tried a new PSU but did not make no difference.
Many thanks

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I am in the process of building a PC for the first time and, after doing a breadboard and putting all my components into my case I tried to turn on my PC. However, while a green light on the video card comes on and the fans spin for maybe a second, the fans just stop and nothing further happens, only the green light on the video card stays on. I have tried seaching for the similar problems but haven't found any advice that has helped. At this point the only thing I can think of is that my power supply is too low, even though I have the minimum recommended wattage my video card calls for. Does anyone have an idea as to what it might be?

PSU: Corsair CX 500
CPU: AMD FX-6300 6-Core
RAM: Crucial Ballistix Sport 8GB DDR3 1600 MHz
Motherboard: Gigabyte GA-970A-DS3P
Video Card: ASUS GeForce GTX 760 2GB
Hard Drive: WD Blue 1 TB
Power Supply: Corsair Builder Series CX 500 Watt

A:Solved: New PC fans spin for a second, video card light on, but won't boot.

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With no changes to my h8-1534 desktop runing Win 8 it suddenly won't boot.  I press the power button, all case fans start, power button lights up, front case light is on.  I can open the cd tray but it immediately closes.   Nothing appears on the monitor (tested good  and cable).  No beeps from case speaker.  

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So I had a lot of dust in my pc and cleaned it out because I thought that might be the reason my fans won't run, now after cleaning the light turns on but you hear nothing at all, you don't hear the fans or anything it's as if it's off with the lights on I think I might have misplaced one of the cables but I'm not sure

A:Pc light turns on but fans won't run

I moved this cable to clean it and I'm not sure it's in the right place or not

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I was working on my ThinkPad yesterday and stepped away for 15 minutes.  When I came back I could not wake it from sleep.  Did a hard reset.  Screen would not turn on and every light - power, num lock, cap lock, "i" light on case, and the keyboard backlight were all flashing at a slow pace, on for ~1-2 seconds, off for ~1-2 seconds, and it would continue flashing indefinitely.  Longest I let it sit was around 5 minutes.   What I've done so far: Pulled internal battery for 20 min - now the lights don't flash, all lights turn on briefly, then everything but the power button and "i" light turn off.  Those two lights stay on indefinitely.  Fans are on.Pulled SSD and tried booting without it - same symptomSwapped RAM cards, tried one at a time, tried different DIMM slots - same symptomLeft battery out overnight - same symptomRe-pulled internal battery this morning for 20 min - same symptom, although this time I noticed all the lights turned on, then off, then on again, then only the power and "i" stayed on.  All subesequent boot attempts go back to lights coming on briefly and then those two staying on, it only flashed the first boot attempt immediately after BIOS was reset. Any help would be greatly appreciated!  As usual the timing on this is awful, I have a 15 page research paper I'm working on, plus another 2 projects that I need software on this laptop to use...  I'm hoping I don't have to send it back unde... Read more

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Hi Fine peeps, I'm frustrated with this hummer.
I have no signal to the monitor
I have no power light on
The fan for the cpu and power supply are on
cdrw light comes on (initial power test) and opens fine
rom light comes on (initial power test) and opens fine
the hard drive light comes on and runs like a normal startup
I tried two known working monitors.
I checked the connections.
I replaced the power supply even though the one it had was fine
It has an AVI board for video that came from factory.
The avi video is an AMC version 2.0 3D (if that helps any)

This is a Proteva 350mb cpu .... as slow as it is it always seemed to work fine. I have 128 megs of ram.

Any thoughts to why I have no signal to the monitor or pwr light?

A:no power light - fans,rom,cdrw, hd come on

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Hoping to get some sympathy there....seems like there are lots folks who know what they are talkin about so any help is well appreciated.

Story is:
Dell dimension 440 from 2001....was ran off a generator which would abruptly kill power to the computer a lot. Think this needs to be mentioned. Started having problems gettting the computer to turn on...resolved it by shaking and beating the hell out of it(Actually it was more of an opening and closing of the housing, ). It actually worked.... about fifty times. Finally it is no more...there it sits...I opened it up, cleaned with compressed air, checked all connections multuple times, took out all PC cards, disconnected all drives, keyboard, mouse, moniter, and nothing but a green light on my mobo, no fans, no beeps...SHOW ME THE WAY!!!! PLEASE PLEASE PLEASE....

- could it be that stupid little watchlike battery that has been in there for six years now...)

- a bad switch that turns on the computer (not the one on the back of the PSU)....is there a way to override this switch? loop the right wires together?

- what else?????

A:nothing but a green light on my mobo, no fans, no beeps...SHOW ME THE WAY!!!!

An Honorable death, Then Computer Heaven

If the fans don't start the 12 volt rail of the power supply could be bad.
And I suppose it could be that stupid little battery which, incidentally, HOLDS ALL THE INFORMATION in the BIOS. This is all I know. Sorry about the Caps.
Sure, just take the 2 wires off the on/off switch and splice them together, like stealing a car.

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Thank you in advance for any suggestions you can make towards a solution.

I should point out here that I have looked over the forum before asking my question and as it seems slightly different in the way that it happened I thought I would ask.

My system spec:
AMD 64 Athlon 3400 & Fan Kit
Asus A8V Wifi Motherboard
WesternDigital SATA 120GB HD 7,200rpm
Sparkle 6800 128Gb Graphics
2 Gb Geil Duel Channel Ram (4*512)
Sony Floppy
NEC DVD Writer
Lian-Li Case
600W Power Supply

I build the computer last night, spent lots of time making sure I followed all the directions. Spent about 20 mins wondering if I should turn it on to see if the processor fan would turn. After a few ciggys I finally build up the courage to turn it on and it all lit up wonderfully. Power light and case fans came alive CPU fan turned and the monitor flickered to life. Went through the BIOS and set the DVD Drive as the boot disk so I could install Windows XP.

Restarted my PC and it asked me if I wanted to boot from CD or HD went for the CD option and started the Window installation, it then said that it was a new HD and needed to be formatted I said ok and at 5% I realised that I was actually installing Windows ME by mistake. Being the stupid person I am I turned off the powersupply switch.

When I tried to wake up the PC I get no power supply fans no CPU fan no case fans but there is a green light on the motherboard. I have tried removing the Graphics card the HD so far. Tonight I will try to strip it do... Read more

A:[SOLVED] No Fans No Post but has green motherboard light!

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After reinstalling Windows 7 on a new SSD, every time that I shutdown this HP Pavilion p7-1154 desktop PC the blue light and fans on the tower stay on. I do not get any error messages. I have no missing drivers according to the device manager. I have installed all the drivers from the HP website and all the Windows updates. I already tested unplugging all the connected peripherals. The problem still occurs without any peripherals connected. The only way to fully shutdown the computer is by pressing and holding the power button. I have uploaded a video here to demostrate the problem. I have searched for a solution to this problem on Google and on this forum. I have tried almost everything. I am desperate for help. Does anyone know why this is happening and how to fix it? Thanks a lot for your help.

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After shutting down my L390 last night as normal (fully charged). The only event yesterday was installing FX Audio Enhancer to control my speakers - that went well and worked fine throughout the evening. I turned it on this morning (not plugged in) and I got the red Lenovo welcome screen, then the Windows picture for a few seconds - then the screen went black and the fans started screaming (and have stayed that way). No lights are on. I cannot find a way to turn the laptop off. For the last two hours I've had a screaming brick sitting in my room and I don't know what to do. I can't leave the house in case it overheats and burns up. Please suggest something before I go mad!

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i have a home built computer that is about 5 yrs old now but never given me any problems. i just recently bought a gig of ram, and after i installed it i tried to turn on the pc and nothing happened. i took out the new gig to see if that was it but it wasnt, still nothing. the mobo light is on, and ive checked all cables and tried swapping out the power supply and still nothing. i have no idea what to do and complettely stumped. i did smell smoke but i thott it might have just been dust. lol. its been a few weeks since it happened but i work a lot, and havent had the time.

im running a socket 478 soyo MoBo,
an OC'd intel p4 processor,
a 650 watt PS,
2 gigs of ddr ram
(1 stick pc3200, and the other pc2700)
a geforce 7800 gt, or gs, forgot.
and windows3 HDD's, a normal and a slave.
and another external.

A:PC wont power up, mobo light on, but no fans, beeps, or any other activity

what brand of psu? on a 5 year old computer that is always a question, and because the mobo light is on does not mean the power is good.

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Desktop monitor was blank and PC wouldn't reboot or turn off, so I cut power for 30 seconds-plus several times. After restoring power, PC is running but blue power "on" light will not activate and monitor still not working. Have disconnected all USB devices but still no monitor or PC power light indicator even though fans running.Have done everything on HP troubleshooting, incuding trying another monitor, etc.TIA for help.

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Desktop monitor was blank and PC wouldn't reboot or turn off, so I cut power for 30 seconds-plus several times. After restoring power, PC is running but blue power "on" light will not activate and monitor still not working. Have disconnected all USB devices but still no monitor or PC power light indicator even though fans running.Have done everything on HP troubleshooting, incuding trying another monitor, etc.TIA for help.

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kids knocked computer off desk fell on side. now it just blinks and wont start. i opened it up and everything s attached .please help me dont know if its hard drive or power

A:compaq windows xp blinking green light ,fans stop and start.

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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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Yes, I still have an Inspiron 530 after all these years.  Was working fine in daily use, no recent hardware (or software) changes.  Upon shutdown a few days ago the display briefly showed a checkerboard before turning off, and since then it won't boot.

I turn it on, button goes amber then to solid blue immediately, fans are all spinning, yellow LED shines on motherboard and green LED on PSU lit, HDD makes a few disk-like clicks, but there is no single beep that it always used to make when turning on, and screen stays black then shows "No signal".  I've tried switching from ATI Radeon HD 3650 via DVI to built-in VGA port and still nothing,

Screen is good (tried with different computer), power sockets and leads good (switched), I've changed the motherboard CR2032 battery for a fresh one, removed unused cards (modem card, TV tuner card), removed and replaced graphics card, waggled memory cards.  No change in any case.

Spec is slightly upgraded from 2009 original, but hasn't changed in months.

Original spec
Core 2 Quad Q8200 (2.33 GHz, 4MB, 1333 MHz FSB)
3 GB (2 x 1024, 2 x 512), 500GB SATA 7200 RPM, media card reader, Vista, DVD+/-RW + DVD drives, IEEE 1394 card, Analogue/Digital TV tuner PCIex1
Upgrades (over a year ago)
Now 6GB RAM, 120GB SSD with Windows 7, and previous 500GB HDD moved to be D: drive.
Upgrades a month ago
Windows 10

Any advice on what to test/check would be greatly appreciated - thanks!

A:Inspiron 530 Solid Blue Light, Fans, Disk whir, No beep, No BIOS display - can anyone please advise?

Those are excellent troubleshooting procedures you performed.
As there are no 'beeps', there could be a motherboard issue/failure.
Did you remove and replace the memory modules, to see if this made a difference?
No difference, try the following, if you are comfortable working around computers:
Note: The only 100% method of testing a PSU, is to install a known working power supply.Unplug the cord from the power supply, hold the power button in for about 15/20 seconds, open the case, unplug the 24-pin power connector from the motherboard and jump the Green wire to one of the Black wires, reconnect the power cord and power the system, if power supply, case fans and the hard drive run, then the PSU should be good.Note: Do not remove any wires from the plug, use a small piece of wire or a paper clip as a jumper.
Power supply checks out, again disconnect the power cord, hold the power button in again for 15/20 seconds to discharge the residue power, reconnect the 24-pin connector to the motherboard.Remove all PCI cards from the system, take out the video card [if applicable], disconnect all peripherals, except the monitor, mouse and keyboard and disconnect the power & data cables from all drives. Reconnect the power cord and power system on, see if you get a different LED indication on the power button, or 'Beeps'.No difference, remove the memory from the system and try again. Still shows no signs of life then you are looking at a motherboard replacement &... Read more

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My inspiron one 2305 has just quit working.   On power up, the power switch glows a steady amber.  The fans come on and you can hear the HD start to spin up and run.  No video, splash screen, or anything else.  No POST beeps, either.   A possible cause was the LCD inverter, but I've just installed a new one and that did not fix the problem.  External power supply appears to be functioning normally.   I suspect the motherboard is gone.    And the warranty is long expired, of course.
Apparently this issue is a common one for the 2305 and a result of defective design on Dell's part.    Quite a few other people are experiencing the same problem.   Anyone else run across this and fixed it?

A:Inspiron One 2305 has stopped booting up. Steady amber light on power switch. Fans and HD run. No video/splash. No POST beeps.

I have the same issue with mines.

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Putting together a build for a friend, however, I believe the motherboard may have been damaged or was damaged upon my taking part in the build. I assembled the parts, a 430w thermaltake psu, an asus mobo, e5200 intel processor, western digital hard drive, 2 gigs of GSkill, ati hd 4850 gpu and an LG dvd drive.

Posted, gave an error message about cpu fan error, I google it, it seemed to be relatively harmless. While in the bios the computer's signal disappeared, I attempted a reboot to no avail. No error codes, cpu fan stopped spinning. Removed memory, no error code, removed 4850, no error code, case fan connected to the motherboard spins when powered on, motherboard shows green light, no signal detected,

I tested the processor in another rig, and it worked fine, and the cpu fan spun fine. Tested another power supply with said motherboard and the motherboard fan would not spin and it would not post, and no error codes. Is my motherboard dead? Any help would be greatly appreciated. Thanks.

A:New Build, Mobo green light, psu powers case fans off mobo, not cpu fan no beeps

check and recheck the connections on the board, if unsuccessful, make sure you haven t short-circuited the mobo, ...

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So I assembled this PC:
Motherboard: Gigabyte GA-780T-D3L
Processor: Fx-6100
Ram: Hynx 2x2gb 1333mhz DDR3
Graphics cards: Gigabyte RX560 2gb gaming oc
PSU: 500W power supply
Storage: 320Gb Wd HDD with Windows 10 installed

The computer worked fine for about 3 or 4 startups, but now it won't start, and it will not beep. The fans go at max speed(cpu fan, case fan, graphics card fan, psu fan). I tried resetting the cmos, tried only one ram module, and nothing worked.
Please help.

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I have been struggling with this problem for a long time so I would appreciate any help in this matter!

So half of the times (or more) when I try to start up my PC my fans go in overdrive and I get no boot at all. When I shut down and start again the system starts up perfectly normal or again in overdrive. I have no idea what is the cause of this problem.

I have always had this issue even before I moved countries and changed my chassis and power supply.

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Just put my system together.
4600+ Dual, Abit AN832X, 500W Power supply.

The first time I started it up, the fans spun for about half a second, stopped for a second, spun again for another half a second, and so on 3 times, and then the system started up.

After shutting down a couple minutes later, I tried starting it up again, and the fans just keep going in the stop & go loop described above.

I tried disconnecting the CD-R and the Hard Drive, and start again, and it started up. So I figured it was a power supply problem, and power supply wasn't strong enough or something, and decided to reconnect the CD-R and the Hard Drive 1 at a time, to see whether it could handle that.

Same spinning loop. So I disconnected both again, disconnected a bunch of other stuff, and nothing seems to fix it.

Perhaps when I was disconnecting the 2, I shifted the mobo or something. So I tried doing just that, made sure nothing is grounding it, checked the little stands that attach it to the case, etc. Everything looks fine.

Any ideas?

A:CPU won't boot, fans stop & go.

sounds like a mobo or psu problem

what make and model is the power supply, and what are its watt ratings?

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ok...my pc will not boot at all.when i turn it on i hear nothing except for fans...no beeps...the only way i hear the harddrive is to unplug it from the motherboard. anyway theres no bios or nothing...this all happeneed when i removed the heat sink to see what procsesser i have(big mistake) but at least i no know.... i put the processer and heatsink back on properly at least to my knowledge,,,


western digital harddrive 80gb
768mb of ram pc2700
dell 2400 motherboard
intel celeron 2.4ghz
geforce 128mb videocard pci

A:my pc will not boot...fans just spin.....

Hi there, and welcome to Techspot.

When you placed the CPU back in the motherboard, did it just slide in softly, or ..... did some pins bend?

I'd take the CPU out again and have a look at the CPU pins to see if any are bent.

When you put the heatsink back on the CPU, did you clean off the old thermal paste and apply some new goo? You need to. Thermal pads/paste are usually no good once you break that seal. You need to buy some thermal paste and after cleaning the old stuff off, apply the new.

Also, what do you mean when you say:

the only way i hear the harddrive is to unplug it from the motherboardClick to expand...


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hello,my latest comp. go fried during last storm.
so i bought new box(with PSU 400w) i also bought new motherboard cos i couldnt decide what was broken after storm.
I set it all up as in manual instruction.
but i noticed something is wrong as soon as i plugged in power jack into my PSU. (on back) side of comp. I didnt even switched PSU on and all fans started to work,PC not booting or any beeps or any lights occur.
so,new box with power supply,new motherboard,old processor,old HD and old memory.
whats my problem here.
srry for bad english

A:PC will not boot, only fans working

make sure your 4-8 pin cpu power connector is plugged in to the motherboard. you could try taking out all the ram and testing one at a time to make sure you dont have a bad ram stick. reset the bios by pulling the cmos battery out and unplugging it for 60 seconds. worst case scenario, your cpu is fried.

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pc wont boot no fans no power but led on mobo comes on..

same old story eh...
a few days ago my pc packed up no power to the fans wont boot etc.. except the led on the motherboard comes on and stays on..
i have tried resseting cmos and shorting the power pin thingys.. still nothing

my rig: (not an oem)
window xp sp2
ASUS M2A-VM mobo
AMD athlon 64x2 6000+
1 gb kingston ddr2
maxtor 250gb sata hd
20x dvd
no video card or soundcard
x blade case with 450w psu

ye im a bit stuffed really as dont know a lot about pc's and stuff.
suspect its the power supply as the case psu is bound to be poor quality.
so think am gonna get a new psu.. if any1 knows any different or could advise me as to what the problem/solution could be i'd sure apreciate it.


A:PC won't boot: no fans no power but led on mobo comes on

The psu is the main suspect i recon. When you say you tried shorting it, what exactly did you do and what exactly happened?

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I have a Dell Optiplex GX 280 medium tower with XP Pro. It was working great and I sent it to my son via UPS. When it arrived. It wouldn't boot at all. I now have it back here.

When you push the power button, I get a yellow light and the fans turn on but run at a very high speed. On the inside I get a constant yellow light which indicates a hardware failure.

I have disconnected and reconnected everything several times, changed the memory, cleaned the processor and added Arctic Silver 5 to the CPU and Northbridge.

The CD-ROM tray works but won't read anything. It won't start in safe mode and won't bring up "set-up" or "boot sequence". The screen never shows anything.

I found a couple of problems similar to this on Google but have tried everything that anyone suggested.

My question: Is there anyway to isolate the problem. It's an older computer and not worth the expense of just replacing parts at random.

Any suggestions appreciated.

A:PC won't boot, fans at full speed

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I have a desktop that I built four years ago. I used it on a monday afternoon, on tuesday noon the fans came on by themself. Now everytime I plug in the power cord all the fans come on. No boot, no bios access. I tried another motherboard, no help. I tried another power supply, no help. I tried another proessor, no help. It has a Intel D865GLC board, a Intel P4 2.6 GHZ S478, 512KB,800FSB proessor, an ATX 480W power supply, 184-pin SDRAM DDR400 RAM, Intel AMI BIOS, Intel 865 chipset, An Radeon 8500 Video Card, Sound Blaster Audio Card. I removed the video card, no help, I have ordered new ram. Hope someone can help.

A:Fans on all the time, no boot, no bios

If there is a speaker/buzzer connected to the motherboard try removing the ram, you should hear some beeps if everything else is working.

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Hi all, hope someone can help me out of a pickle.

I have an ageing XPS Dimension Gen 3 that's been running smoothing for nearly six years with a bit of TLC here and there.

However, the other day I removed the processor air flow shroud and disconnected the two processor fan connections to blow some dust out. Upon reinstalling it, all the fans cooling the PCI Card, Power Supply as well as the Processor fans are blowing incredibly loud ó like a leaf blower?
The desktop has only booted XP a couple of times but has since stopped.
The power light remains a steady amber colour and none of the Diagnostic Lights at the rear of the desktop are lit up.
I've ensured all the PCI cards/Memory Cards/Graphics cards are fitted correctly incase I knocked them.

Any ideas?


A:Solved: LOUD fans and won't boot

did you remove the CPU fan at all ?
if so there is a usually thermal grease/compond or a thermal pad between the CPU and the FAN - this ensure the heat is removed from the CPU to the FAN heatsink and blown away

if you removed the fan , then you would need to clean the old grease off and replace with new grease/compound

IF this is the case
I would not switch on again until that issue has been rectified

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My friend has a computer he built. It was working fine until recently since he's having this problem where the computer won't boot. I had a look at it today:

Specs of this machine:

Motherboard: Asrock z87-M8
CPU: i5 4690
GPU: GTX 1070
PSU: 450W
RAM: 16 GB

When you turn it on-

>No picture
>Fans start, but are revving (they speed up then slow down repetitively)
>No beep code (this motherboard doesn't have a speaker on it and doesn't have a place to plug one in)

Things we've already tried-

>Trying with just one RAM stick (in either DIMM slot)
>Disconnecting the 1070
>Clear CMOS
>Trying starting with just CPU, RAM, Power (bare bones)

*With all we've tried, the problem persists

Things we haven't tried:

>Testing with a different power supply
>Reseating the CPU

I didn't build this computer and I spent only one hour with it today. I'm wondering if there's something I might be missing.

If anyone has any suggestions on what might be wrong, it would be appreciated.

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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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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.


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

Did this rig ever work?

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I have recently hit a new hardware problem, and I am not sure where to begin diagnosing it.

My updated specs are listed in my profile, itís a machine I built for myself, and upgraded over time. Itís basically four years old. Within the last few months, after I attempted to power it on, it would sit with fans at 100%, and that was it. No beep, no hard drive access, sometimes a flicker on the CD. I had to hold down the power button for seven seconds to turn it off, then it would turn back on and boot normally.

Then in addition to this, a month later, Windows 7 began to lock up just as it was starting. I might see the first bit of the logo spinning out, then it would lock. Same thing, reboot. Works fine the second time.

Now within the last week itís more serious. It might take me five tries to reboot, to get it back in for the bios problem. Seems to be degrading. Windows is still VERY stable once booted, just crashes that first time, but always a first time.

So far:

Bios to default, no change.
Moved hard drive out of Sata II which causes problems on this mobo, no change.
Clean installed windows due to possible Trojan, no change. (MMO info compromised, system came back clean from every scan I did)
Memtest comes back clean after seven passes or so, Super pi seems fine.

Seems like failing hardware, but Iím not sure how to diagnose. Can anyone help me on where to go from here?

A:On boot, fans full rev, no post.

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Hi. Story time (might help locate the problem). A little over a week ago i upgraded to windows 10 from 7. All was good. No complains. Two days ago I found an old HDD I havent used for 4 years, just wanted to see what I had stored on it. Now the problem bigins. For some reason I had to reboot the PC (dont remember why), when it booted up (with hdd connected) i got a error message wich said "inaccassible_boot_device". It wouldnt go past this message so I had to reinstall windows 7 (I disconnected the external HDD ofc). Wich went well. Now i had one millions updates to download and install, this took some hours of course. All is still good. Surfed the web, had fun. Then The night came and I turned off my computer. The next day came and it never booted again..

It starts up, fans working, hearing sound from HDD, but no beep and boot.

The PC is a Alienware x51 (2012) (specs: http://www.cnet.com/products/alienware-x51-desktop/)
All original parts.

I have ofcourse tried a little troubleshooting myself before I turned to the forums.
What I have done:
Removed the RAMs: Result: Continious beeping wich means MoBo OK?
Removed GPU, HDD and everything except keyboard, connected hdmi to the onboard mobo. No result.
Resetted CMOS. No result.
Tried the trick where you feel if the CPU is heating up. It does. So that is working.
Switched the RAMs around, place, with just one etc. No work. I have a old RAM wich i tested (dont know if it works it self) but that didnt work either.

A... Read more

A:PC wont boot. No beep but fans on

almost everything, are you able to check the power supply's voltages or able to test an atx power supply on the system?

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I am new here. I am employed as a help desk/network/I can't print/etc. tech however I am not an electrician and I think my problem is an electrical one.

I have an IBM Netvista with Windows XP svc. PK 2, 700+mbRAM 2.6gb processor. There are no OBVIOUS problems arising out of this and I would never have known about this problem had I not upgraded the guys RAM and saw it. When the PC boots the case fan and the CPU fan on the Heat Sink both fire up. They continue to run UNTIL the Windows XP screen comes up - then I hear an audible "click" and both fans stop. They start up again briefly during a shutdown of the system. I suspect a "relay" of some sort. I can't find any power saving features - I turned off all of Windows power features and no change. No idea how long it has been like this, as there are no obvious symptoms YET. Help?

A:All fans shut off after boot IBM Netvista

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After moving my pc about to get at the wall behind it something seemed to get knocked loose inside it. When I turned it on I could hear the fans spinning and the power light was on but now signal was being sent to the monitor. I thought the graphics card had become loose so I pushed on it, even tho it appears secure and this helped it. Every so often it stops working so I do this again but I don't think the problem is the graphics card because if I leave it when there's no signal it never gets to the point where the windows start up music starts. The video signal also never goes off while the pc is on but sometimes when I have to restart when it comes back on the problem has happened. I think it's something to do with whatever hardware starts the PC up and pressing on the graphics card is also pushing whatever it is back into place but I have very little knowledge about pc hardware beyond changing graphics cards. Does anybody know what it is that might have come loose please?

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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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My computer fan runs and stays on no booting to post and stays on really loud can not figure this out! What am I missing I turned the computer and tried to reboot after the video screen went crazy and loud noise scrambled appeared! lease help! Does my poor partitons are 28 in number on my biggest drive of 1000gb

A:Computer fans runs no boot

you have put your experiance as Advanced,
so have you tried the following:

Disconnect all un-escential* hardware, and revert to onboard graphics (if present)
Try another PSU

Ensure RAM and connectors are properly seated.

*HDD, CD/DVD, PCI cards etc.

also post a more specific fault description.

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I have a Dell Inspiron 2330 AIO desktop. It has been acting up for a few months. On some boot ups, i would get the blue screen stating there was a failure or that Windows couldnt start. I'd restart it and it would boot up fine. About a week ago, I could not get it to boot up no matter how many times I restarted it. Now when I power it up, the fans run continously and the screen illuminates slightly but there is no dell logo or boot. That's all it does. On some start ups, it will automatically shut off and then turn back on. Also, I don't any hear any beeps either. I have racked my brain trying to fix this. The power is good. I've tested the Ram, reset the bios, changed the bios battery, and the hard drive, which I thought was the problem from the start, is fine. Any suggestions?


Dan C

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My computer has recently encountered a problem, whereby when i on the power at my CPU, lights will be lighted up and fans start spinning. But that lasted only about 1 second. After that, everything stops. There are a few times whereby all of them will start working once again, after stopping, but usually they stopped again, with very few times successfully boot up.

I had brought it to the service center and what that guy did is remove my ram and place it back. To my surprise, my CPU boot up. However, a few days later the same problem occur again. And I did what that guy did, but this time round I did clean my RAM metal piece (I don't know what do you call the thing that attach the RAM to the motherboard). It failed a few times, but boot up eventually after several tries (took out the ram, put it back).

I had totally no idea what is going on. This does not solve the problem, as it is going to come back and haunt me once again.

I have no idea what is causing it thus I could not bring it to the service center once again, as he will tell me this if he is able to boot up my computer: "so what do you expect me to do?" It really hurts.

Desperate for help, hope someone know what is exactly going on. Thanks.

A:CPU boot up, all fans spin and stop

If there's a faulty connection, there's a faulty connection... There isn't a whole lot you can do... But try this:

Get a Computer Duster can (A "Can of Air") for $2, remove the RAM, and carefully put the tip of the spray extension (They usually come with a little straw thingy, stick it in the nozzle) near the RAM Slot and blow out any dust or loose dirt/debris/whatever.

Be careful and use short bursts. Too much air friction can actually cause a buildup of static electricity, especially on plastic components (I have fried many a motherboard with this... so really, be careful)

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Hi, I just assembled My computer.
But when I Boot it up there isn't going a signal to the monitor... (No boot)

I've tried clearing cmos. Replacing RAM and GPU.
I've also triple checked that I have connected the wiring accordingly.

Hope anyone here can help me out.

Specs: (all is new)

Motherboard: MSI A78-G41 PCMate.

GPU: MSI GeForce 960 OC 4GB.

CPU: Athlon X4 860k.

RAM: Crucial Ballistix: Sport series 2x 4GB.

Case: Antec Gx500.

Power supply: Corsair CX750M.

Monitor: HP LED 24' backlit.

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my pc wouldnt turn on last week so i took it to my local pc guy with 2 days left on my warrenty he took it and fixed it, he said the graph card fan was was cloged with dust and its all good now brang it home played it for 6 hours turned it off at night like a always do, now it wont boot again. the lights come on all fans are working but my screen go's into standby and it wont boot, a friend said my processor might have a bad connection and thats why it boots when it wants too. im not tech savy so any instructions whould be helpfull (iv tried using alot of differnt screens i even got a new one just incase)

thank you.

A:Pc wont boot, fans working and lights are on

Well first we dont know what kind of machine u r talking about, anyway, what u can do now, is open it, and try to tighten the ram chips and see what happens, ok put yo finger on top of the chip and press it hard while slightly moving it left - right. then try switching it back on again.If it fails then let us know with the specs of that machine.

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I have a computter that was built for me and I got a virus at some point and formated my harddrive then my sister was messing with the computer and taking it apart to check it out and now I believe that I have put it all together right and it does not work I turn the power on and the fans turn and the lights for the drives come on but the monitor does not come on and the tower beeps like every 6 sec and never boots up HELP ME

A:My Computer powers up and all the fans but will not boot up and keeps beeping

Take the ram out and put it back in, being sure you get it seated well.

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So I just bought a computer from someone and got it home and it's not booting up.

I press the power and the fans turn on, but thats it. (The 2 case fans and the fan over the CPU)

I don't hear any beeps or other movement. I touched the harddrive and its not spinning.

What do I do at this point?

I've searched the internet for over and hour and cant find any answers that help.

What I have done.

Removed all ram and tried to turn on - I don't get any beeps.

Taken out the CMOS battery for 10-15 minutes and put it back in.

Tried to reset the CMOS jumper, but not really sure how you do it.
I am just trying to locate exactly what the problem is and maybe fix it. Or atleast know what I need to buy to get it going.

Any help is greatly appreciated.

A:Solved: Computer Won't Boot. Please Help!! Fans work...

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Computer won't boot up. Fans and cd drives work. I get no signal on my monitor. The light on my motherboard is green. If I leave it on, sometimes it will shut off. Also, my keyboard lights don't come on. No beeps. I've removed ram, put it different spots. Still not working.

Motherboard: Asus M2N SLI Deluxe
Processor: AMD Athlon X2 64
OS: Windows 7

A:Computer won't boot up. Fans and cd drives work.

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Hi guys,

I have a computer that we recently cleaned out because it was getting hot and shutting down randomly. At first it wasn't starting but we figured out we seated the CPU wrong (don't know how, some pins fell in and we missed the fact that it wasnt all completely in), so we reseated the CPU according to the notch and it booted up fine.

Now, about a week or two later, the computer will not start. The CPU is seated fine. Turning on the computer everything spins up but no POST beep for anything. If I unplug the video card power, I do get a beep though because it detects that the video card does not have power running to it.

I've tested the power supply with a tester and it was fine, just makes a loud noise when i test it, so I even tried another power supply, still nothing showing up on the screen (not even bios screen). At this point I would assume it was either a) video card b) motherboard c) cpu

I don't have another AGP card to try but I can try another motherboard. Any ideas on narrowing this down before I do?

A:No POST beeps, fans running, but no boot?

So I used another motherboard/cpu/ram combo I had and put the video on there and everything booted up fine. So now my guess is the problem is either the motherboard, or the CPU. Before we make any purchasing decisions, how can I be sure (without buying one) whether it's one or the other?

EDIT: I should also mention.. I don't mind giving him the cpu/mobo combo I have, but since he already has a hard drive I'm afraid it may cause a lot of issues with the drivers.

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I have a new z420...when the power button is pushed the light comes on and nothing happens but the following:  the fans go into turbo mode very loudly....and stay there....no video output, no power to peripheral usb devices....no boot up.  Just loud fans.  No way to shut down during this except to power off holding in button.  Please advise!

A:z420 on startup fans rev up loudly and won't boot

Hi hansonthree!


Sorry to hear you are having trouble starting your Z420 Workstation.


I have researched your issue. I have included a link to the Maintenance and Service Guide for your workstation. Your situation is mentioned on page 127 under the ?Troubleshooting scenarios and solutions? section. It has a detailed set of steps to take to assist in resolving the issue.







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Hi all,
My 8100 won't boot, I get no output to the monitor, and after about 12 seconds, the cpu and power supply fans speed up to maximum rpm.
I've reseated everything, and when I remove the ram, I get the 5 beeps as well as the fans speeding up to maximum rpm.
Any ideas on what is happening?
P.S. This thread has been moved from Business PCs - Evo, Deskpro, Vectra, Kayak, Brio, e-PC to Business PCs - Compaq, Elite, Pro.
-HP Forum Moderator

A:8100 Elite won't boot but fans are going flat out

Hello, I understand that the system is not POSTing. Please try removing the CMOS battery and all the RAMs in the unit. Power on the unit. If it beeps 5 times, Put one stick of RAM in the unit. You can try a known good RAM on it if you can get hold of one. If the unit still does not POST and the fan revs up high, I am afraid the system board will have to be replaced. Thanks,Robin

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