User Guide

12 - Power Mac G4 Cube Troubleshooting
Symptom Charts
Sound
No sound from speakers and unresponsive USB peripherals
The speakers that come with the Power Mac G4 Cube computer may suddenly go silent if
an Apple Studio Display LCD (ADC) or an Apple Cinema Display (ADC) is connected and
music is playing with the volume set to maximum. Additionally, USB devices (such as the
keyboard and mouse) stop responding if they are attached to the monitor's USB
connector.
1. Connect the speakers directly to the computer instead of the monitor.
2. Restart the computer and lower the volume. If the mouse is responsive, you can
choose Restart from the Special menu. If the mouse is unresponsive, you can force a
restart by pressing the reset button on the bottom of the Power Mac G4 Cube
computer.
Video
A monitor with an Apple Display Connector displays no video when
connected to a Power Mac G4 Cube computer; however, if you connect a
monitor with a VGA-style connector video appears on the display
1. Connect a known-good monitor with an Apple Display Connector (ADC).
2. Verify the monitor with an ADC has a known-good power source.
3. Make sure the display cable from the monitor is securely connected to the video card.
4. Make sure the video riser card and the video card are properly seated in their
connectors.
5. Verify the cable connector at J3 on the video riser card is pushed in all the way. This
connector provides the voltage for the ADC.