I have a Athlon XP 1600 with a Soyo Motherboard. My computer locked up the other day. I shut it down and attempted to reboot and got a Post error. Tried to reboot again and now I don't get video or anything. No beeps. I removed everything and reseated the memory and cpu. Disconnected all other hardware. Still no video or beeps. Swapped power supply. Still nothing. Swapped video card... still nothing. Narrowed problem to either the CPU or motherboard. What do you think?