Q: Built my computer four months ago or so. Worked perfectly until last night. Was just browsing, doing nothing out of the ordinary. Then my screen solid gray. I thought it was locked. So I kept my power button a few seconds, and the computer off as it should. But it would not be on again. And I have been unable to get to on again, because then.
I have no spare parts or additional computer to exchange and test, so I was just another PSU and hope that the work ordered. But it struck me that there might be something else wrong that caused the PSU to fail. I do not want to get a new diet only to have it fail a few months. PSU is a 500W Enermax
The Liberty.
Any ideas or words of wisdom for me? 
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Re:Surge protect border on wothless…spend the extra money on a quality UPS.
Power Jingles
Re:With the nice system you have, i'd strongly consider an APC battery backup with surge protection instead. You can get a decent one for $49 and up.
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Re:Just wanted to follow-up on this issue (thanks for the great feedback!)
Took it to a friend's house a couple days later, it took about 15 minutes to determine that it was a bad PSU. That's the good news, since I didn't have to deal with RMA-ing a faulty motherboard and deal with the cabling, etc. So I ran out and bought a new PSU… installed it, and everything seemed fine.
Brought my computer home from my friend's place, and hooked it up. No video. "Oh christ…" To make a long story short, it appears that something caused a surge in my power outlet, and simultaneously took out my PSU and my friggin monitor. Confirmed that the monitor was dead today. Have a new 20" widescreen coming from Newegg now. Got to love forced upgrades!
Anyway, I'm not sure if it will help, but I'm investing in some sort of badass power surge strip. I had like a $20 one, but I'm going to bump that up a bit.
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Re:Sounds like a bad PSU…had a similar thing happen to me 2 weeks ago; new power supply fixed it. I'd try that first.
As for what happened…who knows. Could have been a faulty PSU, or perhaps a sudden power surge. That's what happened with mine at least: a blackout and then my PSU was gone.
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Re:Generally if the board died the PSU would turn on, like dph said, unless it's shorting it our something. You could jump the PSU manually to see if it's still working while not plugged into the board (don't keep it running for more than a few seconds without a load on it): http://www.hardwaremods.com/guides/psu_jump/psu_jumping.html
Other than the PSU or motherboard there aren't many ways your computer would shut off and just not turn back on.
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Re:The machine you typed this message on, can you "borrow" the power supply from that to test on your machine?
When you do try to turn it on, does anything happen? My motherboard just died. When I pressed the ON button, all fans would spin, but nothing on the monitor, so the power supply is still good.
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Re:Just for grins & giggles, try clearing the CMOS.
Follow the correct procedure in your MB manual.
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Re:Make sure all cards, cables, and wires are still securely connected – you never know
Hopefully, it's not a broken motherboard.
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