Filter
Top Products
Troubleshooting General/ Power Supply Verification - 22
Power Supply Verification
To start up, the Power Mac G4 logic board requires a “trickle”
power of +5V for AGP and PCI models, +28V for Gigabit Ethernet/
Digital Audio models, or +25V for QuickSilver models. If the
system fails to start up, follow the procedure outlined below to
determine whether the problem is related to the power supply.
Note:
To verify the power supply, you need a volt meter.
Verification Procedure
Follow the procedures in the Take Apart chapter to access the
power supply.
Important:
For this verification procedure when connecting the
volt meter leads to specific pins, ensure the power supply cable
remains securely plugged into the power supply connector on the
logic board.