Power Adapter Note

The system was designed to use the Apple 65-Watt Portable Power Adapter that came with your computer. The previous 45-Watt Apple power adapter for PowerBooks is plug compatible, but it may not provide sufficient power during some activities and power may be drawn temporarily from the battery. You can identify the Apple 65W Power Adapter by its markings (see photo).

Under low battery or no battery situations, the 45 watt power adapter may not be able to provide enough power to properly support the system.

Although you may have used the 45 watt adapter with a PowerBook G4 (1Ghz/867Mhz) without trouble, the peak power requirements of the PowerBook G4 (15-inch FW800) is much higher and will have a higher chance of encountering compatibility issues.

Hardware Symptom Charts

PowerBook G4 (15-inch FW800) Troubleshooting - 11

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Apple FW800 manual Power Adapter Note