Well I'm sure there are so many post about this but idk if mine is same as others. My computer was running fine for more then 3 years. I just turned the computer off today as I do almost every week. When I tried to turn it on, it just turned off. This what happens, I hit the power on button, all the fans (3 case fans, 1 cpu fan) turns on, but just when the bios suppose to come on the screen, it turns off. It usually beeps at that time, but this time it didn't, instead it turned off, no beeps. I tried switching the ram, and still same result. Tried unplugging every thing but the main hdd, and still same result. I really dont know what to do. I'm going to get the air spray thing and change the battery tomorrow. Really need help. My specs (NONE Overclocked): Asus M2N-E AMD Athlon 64 x2 5200 Nvidia GeForce 8500 DDR2 800 4gb (2x2gb dual channel) G. Skill ram 1 Sata HDD and 2 IDE HDD 1 Sata DVD-RAM Thank you. Additional, I tried everything from the Tutorial: No POST (Power On Self Test) except the dusty part, going to do that tomorrow, and replace the battery.