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Author Topic: PC powers on for 1 second then shuts off  (Read 434 times)
Gazza1 (OP)
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April 08, 2014, 11:49:58 PM
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why does my computer do this sometimes?  The only way to fix it is unplugging the PSU for a few min then trying again.  I've tried different psus, all high quality, so it must be the mobo?  But it does it on a couple of my computers.  What's the deal

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April 09, 2014, 12:04:00 AM
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You need to clarify: upgraded PSUs on all/some computers? Same problem on all computers with same/different power supplies? To solve an issue, it has to be isolated.
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April 09, 2014, 02:07:51 AM
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I have this with one of my power old supplies, one of the power rails seems to be dead, and I can only run half the watts on the 12v rail. But it could be you just wired something up wrong, if you plug in a speaker on the motherboard it might beep an error code if it's a motherboard error, if not you can get a motherboard diagnostic board off ebay.

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