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Win7 x64 turns off the screen and cannot go back
I left my laptop running fine last night and Win7 turns off my display after 5 mins of inactivity. So when I woke up in the morning the screen was black, the problem is that I cannot do anything with the laptop anymore. Pressing keyboard keys or moving the mouse doesn't make the display go back as it used to be. I can also see that the HDD LED activity light is not flashing anymore. The laptop obviously froze so I had to hard reboot. This is not normal, what could be causing it? I tried looking at Event Viewer and I found nothing suspicious, there was the "expected" Kernel-Power error stating that the shutdown was unexpected, simply because I had to hard reboot. Help would be much appreciated. Thanks.