I was watching movie on my laptop Acer Aspire 4830T and got a white screen. I tried to reboot few times but no changes. White screen appear just right after laptop start on.
I connected laptop via VGA cable to TV and could see message like "windows try to sort out start up problems:
Problem Event Name: StartupRepairOffline
Problem Signature 01: 6.1.7600.16385
Problem Signature 02: 6.1.7600.16385
Problem Signature 03: unknown
Problem Signature 04: 118
Problem Signature 05: AutoFailover
Problem Signature 06: 1
Problem Signature 07: NoRootCause
OS Version: 6.1.7600.2.1.0.256.1
Locale ID: 1033
So laptop can works via VGA output but only white screen on display.