1st gen eMac service manual here:
I forgot that you had that older eMac. (I try to forget the "fun" of getting the power button connector in place, too )
I used to keep a couple of power buttons for those old eMacs, because they are so easy to damage, but long gone, and I only keep (bad) memories, so I can avoid working on them, ever.
The PMU battery on the logic board is probably dead (Die very quickly if the PMU crashes), and might prevent boot. Follow the manual to reset the PMU after you replace the battery.
Inspect the capacitors on the down converter board. That distributes power to the logic board and devices, and is that strange board that attaches perpendicular to the logic board. The capacitors (silver cans) often will be visibly swelling/leaking, and would be a quick first step to look at.
I forgot that you had that older eMac. (I try to forget the "fun" of getting the power button connector in place, too )
I used to keep a couple of power buttons for those old eMacs, because they are so easy to damage, but long gone, and I only keep (bad) memories, so I can avoid working on them, ever.
The PMU battery on the logic board is probably dead (Die very quickly if the PMU crashes), and might prevent boot. Follow the manual to reset the PMU after you replace the battery.
Inspect the capacitors on the down converter board. That distributes power to the logic board and devices, and is that strange board that attaches perpendicular to the logic board. The capacitors (silver cans) often will be visibly swelling/leaking, and would be a quick first step to look at.
Last edited: