Here's the deal: I've had this computer for about 5 years, and never had a problem like this before. (As a side note, I replaced the CRT monitor that came with the PC with a new LCD one on January 2nd.) On February 3rd, my PC just shuts down out of the blue. Not thinking of this as a big deal, I tried turning it back on. No matter how many times I turned off the power supply, and pressed the power on button on my PC, it wouldn't run like it usually does. The following are the different ways this faulty computer reacts to me trying to turn it on: 1) The fans run, and everything seems to power up fine for about 4 to 5 seconds... then it randomly shuts down. I don't even hear the first beep. 2) It turns onto the BIOS screen a) After exiting BIOS, my computer turns on and everything runs like it should. b) Before even getting a chance to exit BIOS, the PC shuts down... again. 3) Everything runs smoothly like it did before, and my PC only shuts down when I want it to - no problems. 4) Everything runs smoothly for 5 - 10 minutes. Random shut down once again. 5) When I turn on my power supply, my PC sometimes turns on by itself. How odd. 6) Nothing runs. No fans, no nothing. Is my motherboard fried? Is my LCD screen using too much power? Is it just time to get a new computer? I need help! I think I'm going to go mad with rage.