My oldest 800mhz G3 'book suddenly has a major issue - won't turn on with any regularity, can occasionally get restarted and booted by pressing the power button and inserting - removing - reinserting the power cord. Makes a low tone almost like a low toot sometimes with no boot, sometimes does that before booting. And, it will not charge a battery when it does boot.
I have another dead 800 with some parts I can cannibalize. My question is, do the above symptoms point to just the little power board, or to a mainboard failure?
I know the teardown is a bit of a bugger - maybe something fo