2835 Views 1 Reply Latest reply: Dec 1, 2008 10:26 AM by jpl
The Mac powerbooks (not iBooks) have an internal rechargeable backup battery. These 'books do not require a working "PRAM" battery to run as do desktop machines. When stored, two things can happen: The power manager becomes corrupted as the batteries run flat or the PRAM battery can fail with an internal short...this will prevent the 'book from starting.
First, reset the power manager and see if it will start:
If no success, disconnect the power adapter, remove the main battery, then press the power manager reset button for 15 seconds. Now connect just the power adapter and try starting.