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Random computer reboot ?.

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Alex Sunny:
Hello,

I never turn my computer off (ever, other than a reboot once in a while).  In the past month or so, I've sat down at my desk only to find that, at some point, the computer's rebooted on it's own.  Unfortunately, when it does this, all I get are blank monitors.  The computer was (over) built my me about 3 years ago, it's as cool as it's going to get without water, the dust was blown out about 6 weeks ago and I only installed LL about the same time.  No issues when it's running and (so far) it's never happened while I've been sitting in front of it.

I've gotten the occasional Blue Screen of Death (on other computers) back when I was running Windows but there's just "nothing" there when this happens now.  It's like the monitors are turned off.  Memory is correctly seated (although I guess it "could" be dying) and there's nice cool air blowing out of all 3 exhaust fans.  If I hit the reset button on the computer case, she boots right back up (although a little slow).

What do ya'll think?  HDD?  RAM?  mobo?  Linux?

ASUS M4A89GTD PRO mobo
AMD Phenom II 965 Black Edition Deneb Quad-Core running at 3.4Ghz (not overclocked)
4GB (2 sticks) HyperX DDR3 1333 RAM
EVGA GeForce GTS 450
Corsair 650W PSU
all wrapped up in an Antec 1200 case
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Everything but the PSU and case were new in '11.  The PSU and case were new in '09.  If there's a hardware issue, I don't mind replacing a part but I can't afford to build a new computer.  If it's Linux related, I don't mind reinstalling it other than losing all my Firefox/Thunderbird data.  I CAN'T lose some of that.  With nothing like Mozbackup to back that stuff up, I'm screwed.  (One of the reasons I haven't ditched Win7 on the laptop for LL.)


thanks
alexsunny

trinidad:
Are you dual booting the machine with Windows? If so Windows update will automatically reboot the computer after recent updates, sometimes more than once, and if Windows can't reboot through to the UI it will suspend (black screen) to save RAM stored data. I never leave any Windows machines on continuously.

TC

someguy:
 
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