If SAFE MODE works, set the video properties to 800x600 then reboot.
I opened my computer to clean it, as I have done many times before. Now when I try to boot up, the computer turns on and starts to boot up, but then it shuts itseld off - sort of. What I mean by sort of is that it stops running and the screen goes black, but the light on the computer is still on and the power is still going.
Does anyone know what I could have damaged when I cleaned it? I am 99% sure that everything I unplugged is plug in again.