I am running a Q6600 processor on an Abit Ip-35e motherboard with a Thermaltake power supply (not sitting at my computer atm, but I think its a 650w PSU), and 4 gb of Corsair DDR2 Ram I built this computer a couple months after the Q6600 came out, so its about 2.5 years old (maybe 3?). Until now, I have not had any problems. My computer has just recently started to refuse to boot up after being shut down or put in sleep mode. There are 2 LEDs on my motherboard, one is red that means the computer is plugged in, and a green one that means it is turned on. After shutting down (or being put in sleep), the Red LED now shuts off, and the computer will not boot unless I unplug the Power cable from the back of the PSU, wait 20 seconds or so, unplug the connection from the PSU to the motherboard, replug it, and plug the PSU back into the wall. Sometimes I have to do this 2 or 3 times in order to get the Red LED to light up and let me start my computer. What is causing this problem? Edit: I started experiencing this about 2 weeks ago. I just moved into my apartment a month ago. I am suspecting that perhaps my apartment is not wired 100 percent correctly, and that this could be causing the problem. How do I test this?