One of my computers is shutting down on me. Maybe after 15 seconds or maybe after 15 minutes. It is not rebooting it's self, (not the sasser worm) it just goes to a blank screen. Wiggle the mouse and nothing. If i power off then boot back up again it boots clear up fine, then 15 sec. or 15 min. blank screen again.
SOYO motherboard. I have switched the memory, switched the video card, switched the monitor. (it's not the screen saver or shutdown monitor settings.) The fan is working on the Proccesor. So I'm guessing it is the motherboard.