hi: my newly upgraded cube suddenly shut down and i heard a faint pop and a burnt smell. i haven't had the heart to try to boot. i just turned the battery off. i upgraded yesterday to a gigadesign 1.4 mghz processor upgrade. i made sure the jumpers were in the correct position and followed the instructions to the letter. i even had an external fan pointed at it. when this happened i was downloading 10.5.2. any ideas, suggestions, comments? gladys