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Q: Hi...my powerbook G4 seems to have the speakers turned off and i can't turn it back on with the F3 key like normal. F3 thru ... Hi...my powerbook G4 seems to have the speakers turned off and i can't turn it back on with the F3 key like normal. F3 thru F5 have a circle with a diag'l line thru it more
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May 23, 2012 1:53 PM in response to betsy213by BGreg,Do your resets:
PRAM:
- Shut down the computer.
- Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
- Turn on the computer.
- Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
- Hold the keys down until the computer restarts and you hear the startup sound for the second time.
- Release the keys.
If that doesn't fix it, reset PMU: http://support.apple.com/kb/HT1431