Try resetting the PRAM by cold booting while holding down the command-option-p-r key combination until you hear the start up chime for a third time.
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Apple Mac Book Battery not Charging
My battery has stopped taking a charge. This is the second battery I have had in this Black Mac Book. The first time I was told there was a firmware update that I needed to download that would fix it and I have since installed it. Is this battery fried or is there a board reset or hardware reboot that I need to do so that it will take a charge. FYI (Days before it went out the battery was still at 100% health)
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Answers
Also try downloading and installing this Apple Battery Update: http://www.apple.com/suppo
Also read the information on the same link about an Apple battery replacement program.
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by: kanluePosted on 2008-06-12 at 08:52:28ID: 21770792
did you try to boot into 'open firmware' to reset all to try?
-----------------
1) Boot into the Open Firmware. (Command + Option + O + F)
2) Type "setenv security-mode none" and press return.
3) Enter in the password at the password request prompt and press return.
4) Then type "reset-all" to restart the computer.
------------------
if that doesn't help, the battery probably needs to be replaced.
hope it helps.