my dell laptop's screen is black after boot. it has a cursor though. ive ran all of the diagnostics and f8 and everything. it says nothing is wrong in each test. the fan is running and it acts like its fine, like turning on sticky keys comes up. before it went black, i had a virus on it that i was repairing but when i restarted my computer, this happened. im just 14 so keep your technical terms small x) please! thanks!!! :)