Mac PowerBook G4 won't boot (but will give the boot "bong"). If I press on the case below the motherboard, it boots and, if pressure is maintained, functions normally.
If pressure is released, video will scramble, and -- sometimes -- system will freeze.
I've run the mboard out of the case with just power, and pressed, squeezed,etc. without any hint of what I'm looking for. I've examined it with a glass looking for cracked board and/or traces, separating solder joints, the obvious. It does still fail out of the case, so this isn't a short-to-case issue.
Any ideas what else this might be? Do ASICS and other ICs fail (internally) in this mode?
Thanks,