I have this computer since I grauduated from school and now I m a sophomore at the college. This has been my mate ever since and never had any peoblem with this. But suddenly one day it stopped working at once. After that I tried turning it on and it was successfully booted to the home screen. Then again one day the same thing happened. But now its worse the coputer screen goes blank with a black screen and the computer shuts down. And I have to wait for 15-20 before I can actually reboot it. I m scared now what should I do to get rid of this problem.