User Guide

4 - Power Mac G4 Cube Troubleshooting
General Information
5. Locate J3 on the video riser card, and check the voltages from the back of the card as
shown below.
6. The voltage should read 28 V (+0.5 V -1 V). Make sure the cable is securely seated in
connector J3 on the video riser card and at J11 on the logic board.
The testing is complete. You have just verified that the power adapter is not the cause of
the "No apparent power" symptom.