M5183 Power Mac G4 (Gigabit)(Digital Audio) Front Panel Board – Power Button – Switch $15.00 Control panel for power switch. M5183 Power Mac G4 (Gigabit)(Digital Audio) Front Panel Board - Power Button - Switch quantity Add to cart Add to Quote Continue Shopping Category: M5183 Power Mac G4 Graphite Description Front Panel Board assembly, or power button / switch for the Apple Power Mac G4, Gigabit and Digital Audio models. Apple 922-4234, 820-1178-A. Includes shield/mount.