Why won't it turn on? I have a HP desktop (DC7100c) and I turned it off last night and now it won't turn on. There is a green LED light on the motherboard that blinks approximately twice every second. I've tried jumping the PSU (Power Supply Unit) and the fan turned on.. Hmm.. So the Motherboard is on, blinking green, and the power supply works but I still can't get it to boot?? Why??? I'm COMFROOSED. I've also tried to hold down that button in the inside with CMOS on the side of it but still, no luck. I wish I had the money to get this fixed but sadly I don't. Hopefully someone can help me here. I also have Yahoo messenger (Phone call optional) if someone think they can help me with this problem.