Alienware17 "boot failure on device"

Just bought my alienware17 2 weeks ago... it wont boot up anymore after it crashed when i was play starcraft2. when i turn it on the fan makes such a big noise on alienware logo screen. and then it appears "boot failure on device" and i tried change settings in f2 and f12, no working, and somethimes i can not even go into boot setup and f12, it would just be black screen......please help!!!