Power manager reset – Apple Mac PowerBook 550c User Manual
Page 168
Additional Procedures
Power Manager Reset - 1
Power Manager Reset
Reset the power manager if
• the battery and power adapter are proven good, but the
computer will not power on.
• The computer will not reset after a system crash.
To reset the power manager in the PowerBook 550c,
1 Remove the AC adapter and the battery.
2 Let the unit sit without power hooked up for 3–5
minutes.
3 Simultaneously hold down the Control, Command, Option,
and Power On keys for 5–10 seconds.
4 Reinstall the battery and, if necessary, reconnect the AC
adapter.
5 Turn on the computer.
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