User Guide

2 - Power Mac G4 Cube Troubleshooting
General Information
2. Press the PMU reset switch (S1) once on the logic board. Make sure the connector J4
on the video riser card and the video riser card is installed in its connector, then
proceed to step 3.
Warning: Do not press the PMU reset switch a second time because it could affect
the PMU chip. S1 is located on the logic board, under the video card, near the edge
of the logic board at the end opposite the video ports.
3. Wait ten seconds before connecting the power (adapter) and turning on the computer.
If the computer turns on, go to the next step. If the computer does not turn on, there is
something else wrong with the computer.
4. Use Apple Hardware Test to check the computer.
Important: This procedure resets the computer’s PRAM. After resetting the PMU, be sure
to reset the time, date, and other system parameter settings.