I was wondering if you guys have any insight as to what's the problem here. I left my computer on (as I always do) and went to work. When I came back home, I found my computer off. I thought to myself, "hmm..that's weird, I know nobody comes into my room or they BETTER NOT...stupid bratty little sister..." Then as I tried to turn it on, it won't turn on. Nothing. Not even a small sign of life. I took the casing shell off, and tested the power supply. The power supply was okay. I was disappointed when I found out the power supply was okay because that being the one obvious flaw, I don't know what's wrong with my computer anymore. Do any of you guys have any ideas as to what's going on? I will tell you that I leave my computer on for long periods of time which is probably something I shouldn't be doing from now on. Any help is appreciated.