Mac OS X 10.1: Using a PowerBook With Display Closed
Symptoms
If you connect a monitor, keyboard, and mouse to a PowerBook computer that is in sleep mode and leave the display closed, when you wake the computer it wakes for a few seconds and then immediately goes back to sleep.
Products Affected
Mac OS X 10.1, PowerBook G4, PowerBook G4 (Gigabit Ethernet), PowerBook (FireWire), PowerBook G3 Series (Bronze Keyboard), PowerBook G3
Resolution
Download and install Mac OS X 10.1.5 or later. It is available from the Software Updates pane of System Preferences, or from the Apple Software Downloads Web site (http://www.apple.com/swupdates/). With Mac OS X 10.1.5 or later you can use an external display while the PowerBook display is closed by following these steps:
1. Put the PowerBook to sleep by closing the display.
2. Connect an external display and keyboard.
3. Press a key on the external keyboard.
Note
: The AC adapter must be connected or the PowerBook will immediately go back to sleep.