The motherboard swap attempt went badly. Currently, it powers on, then powers itself back down after 5 seconds, with no change to monitor state. (If RAM is removed, it also beeps like hell before powering down.) If I remove the ATX 12v input, it doesn't automatically power down, but it doesn't really power up either - no monitor state change, keyboard states can't be changed (except for F-Lock, which is computer-independent), and the drives do nothing except their standard power-on functions. It also takes a 5-second hold of the power button to turn the machine off.

So, I don't have a working computer for myself at the moment. Joy.

We initially tried this at Kevyn's place, and I tried to test it more here, but without success. I'm going to be taking it over to work to see if we can get it working, but I somehow doubt it will work. Our best guess is that the CPU is probably overheating upon start and causing an auto-shutdown, since the machine was able to beep when the RAM was pulled.

Annoyed.