Hi, my grandpa's computer froze. I manually shut it down. Then when i went to restart it, it wont boot up again. the monitor doesnt even register on the thing anymore. i cant tell whats going on it just says no input and the monitor shuts down. the computer doesnt even boot down anymore. i hit power off and the fan keeps going? what should i do? I dont want my grandpa to find out!! its windows xp. evrything was fine an hour ago!