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P8z68-v startup fails, retries, fails...

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January 7, 2012 2:52:30 AM

Mobo: Asus P8Z68-V ATX LGA1155 Motherboard
CPU: Intel Core i5-2500K 3.3GHz Quad-Core Processor
RAM: 8GB Patriot (2x4GG)
PSU: Antec EarthWatts EA-650 GREEN 650W
GPU: GIGABYTE GV-R695OC-1GD Radeon HD 6950 1GB

Problem: I left the computer asleep. Came back about 2 hours later and when I tried to wake it up, it just made fan noises, but in short 1 second pulses with about 2 seconds of silence between. Opened it up and what is happening is that when I turn on the unit, the boot device LED flashes then shuts down, then the CPU LED comes on and the fans start for about half a second. Then everything stops for maybe 2 seconds and the CPU LED goes off. Then repeat. It'll keep doing this until I press and hold the power button to kill it.

I hear no POST beeps. I've already tried removing different sticks of RAM with no luck. I've reset the RTC RAM.
a b Ĉ ASUS
a c 82 V Motherboard
January 7, 2012 11:29:11 AM

Had you OC'ed the rig before ....? I mean was it OC'ed when you left it on and went away for 2 hours?
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January 7, 2012 12:41:40 PM

Nope, it's standard.
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a b Ĉ ASUS
a c 82 V Motherboard
January 7, 2012 12:45:58 PM

You have tried clearing the CMOS, reseating the CPU and running the rig on just one RAM already right?
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January 7, 2012 1:31:20 PM

RAM yes, CMOS I just removed the battery and moved the jumper cap and will try that next. CPU I haven't tried but will try after, though I can't imagine how the CPU could've budged.
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a b Ĉ ASUS
a c 82 V Motherboard
January 7, 2012 1:38:04 PM

:)  It may not have budged, but, may have overheated and then lost a contact somewhere....
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January 7, 2012 2:06:20 PM

No dice on CMOS, CPU is next.
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January 7, 2012 2:20:45 PM

Reseated CPU; no change.
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Best solution

a b Ĉ ASUS
a c 82 V Motherboard
January 7, 2012 2:25:05 PM

Awwwwww. that is really sad, but, I wonder why. For the past 4 days , every post that I have answered, I have had to tell them to remove everything out of the case and try all the stuff one by one and eliminate all possibilities of any of the stuff going bad.
Same goes for you. Now either you try a new PSU or then get everything out and just breadboard it.
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January 7, 2012 3:26:38 PM

Ugh. I guess I figured that was coming, I was just hoping there was some magical process that would fix it all. Is there any way to narrow it down to the PSU?
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a b Ĉ ASUS
a c 82 V Motherboard
January 7, 2012 4:28:04 PM

If you've got a spare one, then it's worth a try.
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January 17, 2012 12:04:14 AM

Just for anyone who stumbles upon this in a search later; in the end, it was the motherboard. I had to replace it. The PSU was innocent.
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January 17, 2012 12:05:10 AM

Best answer selected by senatorium.
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a b Ĉ ASUS
a c 328 V Motherboard
January 17, 2012 12:51:53 AM

This topic has been closed by Nikorr.
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