Won't wake up

April 24, 2009 at 09:01:36
Specs: Windows Vista Ultimate
So I built myself a new PC about a month ago. Intel i7 940, ASUS P6T mobo, Coolermaster 900W PSU, EVGA NVidia 285 GTX vid card and 2X WD raptor's in RAID 0. Put it to sleep last night before bed like I've been doing for a few weeks, and when I got up this morning and tapped the keyboard to wake it up, nothing happened. Mobo has onboard power and reset buttons, which are lit, but pressing either does nothing. After either switching off or unplugging the PSU and then pressing the power button the mobo and case lights up and fans light up and start to spin (cpu, case, video card and psu) for about 1 second, then everything goes back off except for the mobo pwr and reset buttons, which once again, do nothing. I'm thinking a bad PSU, but everything DOES get power, if only briefly. A coworker thinks the BIOS might be stuck in sleep and puts itself back to sleep after trying to power up. Thoughts/suggestions?

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April 24, 2009 at 11:15:56
It's 'most likely' a power supply problem. Don't be misled by the fact that you see some signs of power. The motherboard checks the voltages put out by the power supply and if just one of them is missing or out of tolerance, it shuts the power supply down to standby mode.

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April 28, 2009 at 15:58:47
So ya, It's definately the PSU. Slaved in my old one to just the board main pwr and cpu fan. Powered right up. Put the old one back in the same way. Nada. $180 later and all is well again.

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