Was setting up a UT game online when out of the blue my machine shutdown. Tried restarting but nothing. The fans are turning and the drives are spinning up but all I have is 4 leds showing red on the back of my MSI Pro2a. The book says that code means a processor problem so I swapped the Duron 900 w/a Duron 700 that I know is working. Still the same thing. Pulled all card and mem out, left just the cpu. Same thing. Disconnected the other drives from the PS. Still the same 4 red leds. Any other tests to try before I chunk the MB?