PE 1800 with non-redundant power supply. No post, bios, nothing. The fan in the power supply does work, disconnected peripherals from the system, reseated memory, still nothing. Took power supply out, did the paper clip test and the fan does come on. I'm thinking motherboard. Any other suggestions to troubleshoot?
Also, how do I figure out which specific motherboard this has? I've looked up the specs using the service tag but can't really tell which part number is the mb.