I put my G4 Powerbook to sleep on battery power and forgot about it for a couple of days. Today it wouldn't wake up on battery power. It finally woke up when I plugged it into AC power, and the battery was still over 85% charged. Any thoughts about what happened?
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G4 endless sleep
- Thread starter bigboy99
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Weird. I wouldn't worry about it if it's a one off but if it happens again, I'd probably reset the PMU. 
This has happened to my PB G4 as well - a few times - sometimes not even waking when plugging in the AC power. I have always put it down to the devil entering the machine and have done a quick load of maintenance (repairing permissions etc, zapping the PRAM, resetting PMU as MJ suggested) and it has exorcised the bad things - right up until the next time. Doesn't happen often enough to bother me. I'm still running Panther - is yours on Tiger?
I had some problems similar to that. Only when my PB wouldn't wake back up, the sleep light wouldn't come on either. It was odd. Anyways, i traced the problem back to bad RAM.
And, just for the fun of it, you'll probably want to repair permissions.
And, just for the fun of it, you'll probably want to repair permissions.