I would say your problem is a loose LCD connector. There is a such thing as a white screen of death virus, but you get a bios and welcome screen before the screen goes white if it's infected. To tell if you are infected....Press the F8 key and see if it goes into safe mode, if your infected the virus will not let you get into Safe Mode or Safe Mode with networking...It will just shut down. If you cannot get into the safe mode screen at all...It's a cable issue.