Pc keeps on switching itself off

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paladax

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Joined
Apr 14, 2008
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2
Hi there,

I just recently purchased some bits to build a new computer and I'm having a bit of a problem. It keeps on just powering off randomly though I have disconnected and reconnected every bit on the M/b without any luck. Even if I take it into the Bios or boot off of a cd after a few minutes it will just switch off. There doesn't seem to be any constant variable to causing it to switch off and even the amount of time it stays switched on seems a little random. I have gone into Bios H/W monitor and the CPU doesn't go above 82 degrees F. I have tried disconnecting almost all the power connectors apart from the M/B, CPU and Graphics card connectors and still it switchs off so I know it's not a lack of power. The light on the M/B also stays constantly on throughout all of this.

The only thing I can think it might be is either the PSU or the M/B itself. Anyone got any ideas I can try?

Here is what I have:
500W EarthWatts PSU
ASUS P5KC AiLifestyle Series iP35 Socket 775 8 channel audio ATX Motherboard
Intel Core 2 Duo E6750 2.66GHz 1333FSB Socket 775 4MB
Corsair 2GB Kit (2x1GB) DDR3 1333MHz/PC3-1066
Point Of View 8800GT 512MB GDDR3 256bit
 
Joined
Jul 10, 2007
Messages
351
Couple of quick questions - have you tested it out of the case? If you go into the H/W monitor in the BIOS settings and stay there for a long time does the temp gradually rise (or does it still shut down)? My first reaction to this was that the CPU is overheating (the number one most common cause of this problem) and it still MAY be the problem. Have you used thermal paste between the CPU and heatsink (every time you have removed and replaced them)?
 
Joined
Sep 22, 2005
Messages
271
It could be the CPU overheating. I would try re seating the heatsink (make sure you have the proper amount of thermal paste and that the heatsink is correctly installed).

It could be something else overheating, and I would also suspect the power supply. Cheap power supplies cause loads of problems. Maybe it could also be a bad stick of RAM?
 

paladax

Thread Starter
Joined
Apr 14, 2008
Messages
2
No. It switchs off before the temp rises in the Bios setting. I think I am going to try running it outside the case next just to make sure nothing is touching the mobo and shorting it. Also got another PSU to try tonight (albeit a lower Wattage one.)

And no, I haven't replaced the paste every time. Though I did only reseat it once. Though because the temp seems to stay constant for the time it is on I doubt it is overheating.
 
Joined
Sep 22, 2005
Messages
271
Try taking one stick of RAM out. If it still shuts off, switch the stick thats in there with the other.
 
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