pc shutting down (POWER FAILURE?) on its own

October 3, 2010 at 08:53:23
Specs: Windows Vista Home Premium, AMD Athlon 64 X2 Dual Core Processor 5000+ 2GB Ram
Hi, looking for help with my MESH 5000+ HOME PRO PC.

I've had it from new, and it's now about 3 years old, but this is the first problem that I have had with it and it is driving me nuts.
A couple of weeks after I got the PC, I had an NVIDEA GeForce 9600 GT graphics card installed, but that is the only non-standard component. Everything else is as it was delivered when new.

Around 2 weeks ago, it started to shut down without warning during boot up as though the power plug had been pulled. This gradually got worse, to the point where it could take up to 9 attempts to get it to load to windows. Once Windows has loaded up and I start to use the PC, it can run anywhere from a few seconds, up to around an hour before it apparently loses power and shuts down again. I've run Kaspersky 2010 AV, uninstalled that, installed and run Avast Free AV, and neither of them are picking up anything. I have even reinstalled Vista using the MESH CD that came with the PC when the problem first started, but problem still continued. Everything is up to date..SP2 etc.

My brother-in-law replaced the original 300w power pack with a new 400w one, but this has not made any difference.

Absolutely any suggestions would be very much appreciated.

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October 3, 2010 at 09:28:43
This appears to be a hardware problem, not a software problem, so there's no point messing with the anti-virus. My guesses would be either an overheating CPU or a failing power supply. Going from a 300W to a 400W isn't necessarily an upgrade. You haven't listed any specs about either one so it's difficult to say. If the new one is a decent brand name unit, it probably cost about $50 or so. If it's a generic no-name cheapie, it probably cost less than 1/2 that much. But like I said, without any info about either unit, it's impossible to say if you actually upgraded or not.

In the meantime, check your CPU temp in the BIOS. Is it over 40C at idle?

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October 3, 2010 at 09:34:21
The temp was sitting at 34 degrees. Unfortunately, I binned the old PSU thinking it was goosed.....sorry. The new PSU cost £36 (I'm in Scotland by the way!).

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