Powerbook G4, A1095 left unused for 1 year+
I rescued from storage, but had no PSU. I obtained a non-apple PSU that claims to be a model A1021 rated 24.5V/2.65A.
Of course there is no charge in the main battery, even after leaving it connected to PSU.
No lights when I press the button on the battery. I sometimes get a quick flash of one light when inserting the battery while connected to PSU.
Computer wouldn't turn on unless I remove the PRAM battery/board that sits on the DVD drive.
I bought another PRAM board, but no change.
Now, (with PRAM board installed) if I reset the power manager with Shift-CTRL-OPT-Power / wait 5s / Power, the system comes on. But the clock is back to 1970 (until NTP resets it). The battery icon shows 0% charge and not charging.
What are your thoughts on this? What is most likely problem:
- DC Board problem (but why does power the main system OK?)
- Mainboard problem
- PRAM board/battery (have I just got a second duff one?)
- I would expect the main battery of this age to be dead but is there some interaction with the system I don't understand?
Any other tests you can think of to narrow down further?