I have an Emachine TS1840. It was struck by lightning and I am trying to get it to work. I have replaced the power supply, the motherboard, and the processor. The power supply was first and that matches the model that was in the computer. The motherboard is the correct size and matches the old one as close as I can see. The processor is an Intel P4 just like the original one. When I turn on the computer I hear 1 short beep but that is all. I never get any display. Even if I disconnect everything from the motherboard, I don't get anything. Anyone have any ideas for me?