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CPU Fan won't start after failed System Restore

Last response: in Motherboards
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October 18, 2013 6:50:02 AM

OS: Windows 7 ultimate
MB: ASRock Z77 Extreme 4
CPU: Intel i5 3570K
SSD: samsung mz-7TD120BW R
HD: WD 7K 32M SATAIII

I built this machine about 6 months ago, and it was working fine until a recent issue with a .sys file led me to run a System Restore. The SR failed--I wish I'd written down the error message but didn't--and I had a standard Windows error dialog on the screen. The computer was frozen. I left it alone for a while, but it was clear from the lack of business inside that nothing was happening. So I killed the power.

Now when I power on, 1 of two things happens: either the chassis lights come on for a while, all but the CPU fans working and then it shuts down; or the chassis lights flash and it shuts down immediately.

I'm guessing this is because the CPU fan isn't working, but am no wiz when it comes to this stuff. I hit the Clear CMOS button for 15 seconds, but that didn't seem to have any effect.

Does anyone have any suggestions as to what I should try next?
a c 114 à CPUs
a c 559 V Motherboard
October 18, 2013 1:14:59 PM

I'd say that it's either the motherboard or power supply.
If you have a spare PSU, try testing it.
If not, try starting the board with only CPU and CPU fan installed. See if the CPU fan is spinning.
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