Random shut-downs

[KiwiRob]

Hi All

My computer shuts down randomly. This can happen when the computer is on idle and it has even happened during booting. The computer will sometimes run for hours before this happens, and then it could happen within minutes.

It doesn't appear to be a heat issue with the CPU. The CPU is an AMD Athlon 64 X2 4600+. I've run 'Core Temp' on this to monitor the temperature, which sits around 35 on core#0, and 28 on core#1. The motherboard is an ASUS M2N-MX.

I've also tried the following:

Swapping out the Ram
Tried a different Hard Drive
Removed the Graphics Card
Changed Power Supply (to a higher wattage)
Changed IDE Cable
Removed the LAN card
Updated the Bios to the latest version
Reinstalled Windows
Replaced the power cable

I've tried about almost everything I can think of and the problem still persists.

Could this be a faulty Motherboard?

Any suggestions would be appreciated, thanks.

 

[Slaymate]

While it could possibily be your mobo I would suspect the power supply. You tried a higher wattage power supply, what are the Make and Model numbers of the original and substituted power supply?

 

[KiwiRob]

The old power supply is long gone I so don't have the info for that one. The only thing I remember was it was about 350watts. The Power supply I replaced it with is a Cooler Master rs-500-psar-j3.

 

[Slaymate]

can you post a screenshot of HWMonitor 1.18

Here's a guide to posting screenshots if you need it.
http://www.techist.com/forums/f128/screenshot-tutorial-239107/

 

[InfiniteLoop]

could also be a power problem. do you have a UPS? surge protector?

 

[KiwiRob]

Ok, I downloaded HWMonitor and here's a screenshot:

Anything look fishy?

 

[KiwiRob]

I actually have an UPS which was given to me and I haven't used. I'll plug it in and give it a shot. Thanks.

 

[MindoverMaster]

Your +12V is a little high. That could be the reason.

 

[KiwiRob]

Thanks for the reply. So if my +12V is the problem, how is this fixed?

 

[95BlackGA]

Your +12V is a little high. That could be the reason.

Asus boards do have a tendency to read voltages wrong. Not saying that it couldn't be correct. I would test the 12V with a DMM before I suspected too high of voltage. My M3A76-CM read 11.3V, but my multimeter (read AT the motherboard and GPU) showed 12.6V.

Try cleaning the entire case out. Taking EVERYTHING out. My computer was shutting down at random times because of a faulty motherboard riser, and causing it to short when the PSU wires were pressing on the motherboard.