Apple manual Power Mac G4 AGP or PCI see Figure

Troubleshooting General/ Power Supply Verification - 23

1.Plug in a known-good power cord into the back of the com- puter. Do not turn on the computer.

2.Power Mac G4 (AGP or PCI) (see Figure 1):

Connect the black lead of the volt meter to pin 16 of the 20- pin power supply connector. Connect the red lead of the volt meter to pin 9 of the power supply connector. The volt meter should measure approximately +5V.

If you do not get a reading of +5V, re-check the volt meter connections and measure the voltage again. If voltage is still not present, replace the power supply; otherwise, go to the step 4.

If you do measure +5V on pin 9, the power supply is likely OK. Go to the next step for further verification.