I have a Lenovo ThinkPad E560 20EV with Windows 7, which I just got 2 days ago. I noticed a problem where the computer will not wake up after sleeping. The Think light turns on and I can hear the fan, but the screen remains dark. This is getting really annoying, as I have to reboot my laptop every time this happens. I have already updated a bunch of drivers to no avail. Any help will be greatly appreciated.