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I am seeing an used desktop computer with MSI motherboard and runs Windows XP,

the problem is when i restart the computer using Windows >> shutdowns >> Restart, the computer shutdown but never power up, even if i press the power button again it doesn't power up until i switch the power supply off then switch it on again, then i can start the computer using the power button, What could cause this problem and how to fix it.

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Try swapping the power supply. –  Journeyman Geek Jan 7 '12 at 6:07
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up vote 2 down vote accepted

I would go into the system's BIOS setup and load defaults, see if that helps. Then perhaps try a known good power supply if the BIOS reset doesnt work to start the troubleshooting process and go from there based on what you find with those attempts.

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This is good advice; normally in situations like this, the computer is failing to recover from a power loss state; be it S3, or whatever else. if the computer doesn't turn back on after a normal power loss, for example, that would also explain it. Recovering BIOS to defaults is a good way to ensure that it's not a setting related issue. –  zackrspv Jan 7 '12 at 7:18
    
Thanks everyone, but could it be due to a problem in the Motherboard? –  major Jan 7 '12 at 23:32
    
The bios is a motherboard problem. Yes it could also be something else with the motherboard as well. It could also be the PSU. –  Paperlantern Jan 8 '12 at 3:04
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