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PC is not shutting down sometimes - mother board to blame?

post #1 of 2
Thread Starter 
Hello,
Sometimes, after clicking "start->shut down", after a blue screen with "shutting down" the PC still works - it will never shut down. After that blue "shutting down" my monitor is switching for about 30 secs between HDMI and ANALOG mode. After that my monitor is completly black - only the monitor's main LED is flashing. Sometimes it directly goes to black screen (main light flashing) after "shuttting down" without switching hdmi/analog. Only PC reset works.

To be honest there is even more. When I am starting my PC, INSTEAD of blue screen with "starting windows" I have the same black screen - only monitor's main LED is flashing 3 times. After that - I am in the desktop.

The starting up "bug" is not a problem, but the shutting down is really annoying.

My system is about 1 year old but I really care about my stuff. I clean my system regularly etc.
I don't know is it a system problem or motherboard. Or maybe something else?

My PC:
-windows 7 64bit home
-4690k
-gtx 970
-ASRock z87 Extreme4
-beQuiet L8 730W

Thanks in advance.
post #2 of 2
It's possible you have a really borked Windows install. It happens to a lot of people for no reason most of the time, so you most likely never did anything wrong.

If you're on Windows 7, you'd need to reformat your boot drive, and if you're on 8/8.1/10 you can use a setting called "Windows Refresh". It doesn't delete your files but it does delete your programs. It just wipes the OS and replaces the files with clean ones.
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