Yesterday I shut down my computer before I slept and today when I tried starting it up the computer wouldn't start up... the power button lights up but nothing loads... the screen just stays blank and the light that shows the comp is busy stays on forever. I have kept my computer on for several days/weeks without shutting it off and when I checked the air vents it was all dusty and stuff so I cleaned it but that didn't help solve the problem. Did something in my computer get messed up cause I left the computer on too long or is there any other reason why my computer isn't loading up anymore? Oh and the keyboard doesn't light up either and... the tower doesn't make the usual noise it does when starting up.