Apple Power Mac G4 Cube

Resetting the PMU on the Logic Board

Pmu Reset Switch

The PMU Power Management Unit is a microcontroller chip that controls all power functions for this computer. The PMU is a computer within a computer. Its function is to tell the computer to turn on, turn off, sleep, wake, idle, etc. manage system resets from various commands. maintain parameter RAM PRAM . manage the real-time clock. Important Be very careful when handling the logic board. The PMU is very sensitive and touching the circuitry on the logic board can cause the PMU to crash. If the...