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Windows 7: Monitor blank - PC doesn't boot

04 Aug 2012   #1

windows 7 ultimate 64x
Monitor blank - PC doesn't boot


I turned on my computer and I had some kind of weird issue. The monitor stays blank, and the PC turns on, I can hear the fans but the keyboard is not switched on ; therefore the PC doesn't boot.

Why could this be?
My headphone jack (the front one) is "Busted" so I tried to attach both the headphones and speakers jacks to one adapter. (two in one). First I turned off the PC, attached the adapter and wires, then turned it on and this issue happened.
I have also uninstalled some "codec pack" because I had a problem about launching videos, but I don't think this makes an effect on this subject.

What I tried so far?
Switched on my speaker to check if there's the log in sound.

My System SpecsSystem Spec


 Monitor blank - PC doesn't boot

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