Computer Laptop User Manual

Troubleshooting Power Manager Reset - 2
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 Macintosh PowerBook 550c,
• Remove the AC adapter and the battery.
• Let the unit sit without power hooked up for 3–5 minutes.
• Simultaneously hold down the Control, Command, Option, and
Power On keys for 5–10 seconds.
• Reinstall the battery and, if necessary, reconnect the AC
adapter.
• Turn on the computer.