Home▸ Forums▸ Couple of troubled Powerbooks, won't power on... — #3▸ Couple of troubled Powerbooks, won't power on... — #3
Post #3 by RickNel
Source ForumCouple of troubled Powerbooks, won't power on... — #3
CategoryTroubleshooting
Post DateWed, 17 Apr 2013 - 11:44
Original URLhttps://68kmla.org/bb/threads/couple-of-troubled-powerbooks-wont-power-on.27891/
Post
Exactly this worked for me just yesterday on a Powerbook G4 15". If the PRAM battery is flat, the PMU will not allow booting or charging of the main battery. With the main battery out, leave on charger for about an hour. The power adapter input should go to green. Check the thing will boot. Then replace the main battery and it will charge up over a few hours.

You will be better off replacing the PRAM battery if possible. I started another thread on DIY PRAM battery, no responses so far.

Rick

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