Hmmm. Interesting. I think i've found the display switch, and I'm fairly certain it's on the circuit board with the power/volume buttons that I swapped with a known good. I'll check it out again though.

My only thought left is to disassemble it to the point that I can see the power supply circutry, which looked to involve removing the entire processor cooling system.

If only apple would release a nice shiny new powerbook I'd be in a lot less of a rush to fix this thing.

Matthew