So I just traded my Dual MDD G4 and when he received it yesterday it started doing the thing where when you push the power button it just pulses and turns off (only the light, nothing else). He's tried resetting the PMU, changing the battery. Any ideas? It was working fine when it left me (at least before I installed a 2nd optical drive before packing it up which is what made me think the PMU needed to be reset). Anyone have any ideas as to how to get this thing working again? He pulled the RAM and reseated it, made sure the processor was fully seated, pushed down on the video card to no avail. Has anyone ever had this work by keeping it powered off for a long time (with no battery)? Thanks for the help.