Apple Powerbank G4 manual Resetting the Power Manager Unit PMU

Apple Service Diagnostic Hardware info tab

Apple Service Diagnostic Test log tab

Resetting the Power Manager Unit (PMU)

The PMU reset button has been removed from the logic board. Use the following key combination procedure or the PMU Reset pad (see PMU NMI and PMU Reset pads on logic board, below).

1.If the computer is on, turn it off.

2.Reset the power manager by simultaneously pressing and then releasing Shift- Control-Option-power button. Do not press the fn (Function) key while using this combination of keystrokes.

3.Wait 5 seconds.

4.Press the power button to restart the computer.

8 - PowerBook G4 (17-inch) Troubleshooting General Information