If you hit the ESCAPE key a few times while the
manuacturer's logo screen is up you may be able to clear
the manufacturer's logo screen and get a clue about the
problem . . . OR . . . it could be that your keyboard is
not plugged in correctly or defective - re-seat it
(unplug it and plug it in again) or try a diferent
keyboard and/or mouse . . . also could be the motherboard
has gone to Intel Heaven . . .
Good Luck !