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Computer turns off in under a second from switching on

Forum Homebuilt Systems : General Homebuilt - Computer turns off in under a second from switching on

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Hi,

I have had a computer with these specs for about a year:

Gigabyte 8KNXP motherboard
Intel Pentium Prescott 3.2 HT
2 x 512mb Samsung 3200 ram
Enermax Noisetaker 495W PSU
250GB IDE IBM hard drive

Yesterday while i was using it for low load netBeans work it just went off like someone had pulled the plug out.

I waited about half an hour (it was a hot day, thought it may be something to do with that) then switched it on again, it went off in about half a second from switching it on, no monitor display, no beeps, fans powered by PSU went off and the yellow LED in the top right corner for the RAM didn't light up.

I then switched it on again and the fans and yellow LED stayed on but nothing happened to the rest of the hardware, still no post check beep or error beep.

If I turn it off at the plug the above pattern happens.

I have been through the following troubleshooting;

Swapped RAM about, taking one out, trying the other etc. Tried with no RAM.
Took everything not needed out, PCI cards, graphics, drives.
Looked at the processor to see if it looked burnt, it was perfect gold.

I am thinking its the motherboard but thought i'd get more opinions before I buy a new one.

Thanks

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Sound like your on the right track, but I can't cast a vote twice, so I must say it's 50/50, mobo or CPU. I suspect you may have cooked to cpu though. Mobo's are almost pass through devices at post, so something is preventing the pass through. Take out the CPU and test it someplace, usually local shops will test it out for a small fee.

Reply to PCcashCow

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