happened to me once. I took all the casing off, blew out tons and tons of dust, layed the computer on its side, turned it on and it would show the motherboard logo on the screen the shutuff. So I hit F1 to go into setup even tho nothing was on the screen. Sure enough it took me to the BIOS screen. A few errors came up so I just fixed those, restarted the computer, worked fine. Kept it on its side dunno if thatll help tho
