Computer Can't Turn On

May 31, 2009 at 05:41:25
Specs: Microsoft Windows XP Professional, 1.866 GHz / 2047 MB
I really need some help with this. My computer is 3 years old, and I run it 24/7.
In all that time I've never had a problem like this. It's done it twice, first time a week ago, second time was last night. I'm using it as normal and it shuts off, no error, no warning, just gone as if the power cable was pulled. Then it tries to turn itself back on, working for about a second, then giving up. After a bit it tries again, fails, and continues in the loop until the power cable IS pulled out, interrupting it.
I leave it alone for a while, about 8-12 hours usually, and when I come back, try turning it on again, it fails once or twice, then succeeds. On the way back in when turning on, it gives the American Megatrends Overclocking Failed error, which research has told me doesn't actually have anything to do with overclocking (I've never overclocked anything in my life)

More details about what it's like trying to turn on:
The green power light comes on, amber flashes once, the fans, and everything spins up, then it shuts off and starts spinning down. When it finishes spinning down is when it tries again.
Sometimes it takes about half a second to die, other times it goes for almost 2 seconds, and the CD drive flashes.

Other Info: When I first got the computer I thought it had heating issues, (turns out it didn't and PC Probe just had it's alarm threshold set really low) but I always keep a close eye on the temps anyways, and it wasn't overheating when it dies. I've opened the case, dusted, (it had a lot, but I've seen more with no problems)
Oh something else to note, it dies so fast it can give no messages at all, never reaches the first splash screen while turning on, no BIOS beeps, nothing just spin up, spin down.

The company it was built by went out of business a while ago, so I don't think I can find anyone who will service it without charging a ridiculous amount

System Specs:
Manufacturer: Custom
OS: Microsoft Windows XP Professional
CPU/Ram: 1.866 GHz / 2047 MB
Video Card: NVIDIA GeForce 7900 GS
Sound Card: Creative EMU10K1 Audio Processor (WDM)
Mother Board: ASUS P5B
Intel Core 2 CPU

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May 31, 2009 at 05:57:36
Judging from the age of the machine and the way it's been used, I would be inclined to say that the PSU (power supply) may have failed. If you're sure it's not a heat issue, try relacing the PSU.

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May 31, 2009 at 05:58:09
...I've opened the case, dusted, (it had a lot, but I've seen more with no problems)...

The idea is not to let the dust build up. Dust builds up faster, the more the computer is on. Dust also jams up the moving parts of harddrives. Also dust could cause electrical shorts in
electronic equipment.

My computer took 20 min. to boot the other day.
I was watching the HDD activity indicator light,
and it would remain on, and not rapidly blinking.
Mechanical devices do have problems.

Harddrive manufacturers have software for download for testing HDD.

Look for leaking or bulging capacitors on the motherboard.
^^^ Some pictures of them ^^^

Watch for help from others.

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May 31, 2009 at 09:30:05
Update: About 30 seconds after the original post, it died again. Oh well at least it didn't happen before I posted and I get no help

I was leaning towards a Power Supply problem too, I've got a 350 W unit, is this enough or should I get a better one when I replace it, to avoid other problems

Thanks for the help

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Related Solutions

May 31, 2009 at 09:30:45
I would say the Power Supply is dying. If you replace that and
still have the same problem, it could possibly be your HD.

Download Everest Home:

and check the temps of the PC

Some HELP in posting on plus free progs and instructions Cheers

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May 31, 2009 at 12:53:59
Ok, I've bought a new Thermaltake 430W power supply, and it turned on in one go, didn't fail 2-3 times before catching like the other attempts, I'll post here again if the problem comes back, but until then let's assume it's solved.
Thanks for the help everyone!

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