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Troubleshooting Power Supply Verification/Verification Procedure - 14
3. Power up the computer by pressing the On/Off button on the
front of the Power Mac G3.
Note:
Verify that the power on/off
cable is plugged into connector J30.
If the computer powers up normally then the power supply is
OK. If the power supply does not power up, continue on to the
next step.
4. Check to see if the power supply fan is spinning.
If the power supply fan is not spinning then verify that the
jumper at connector J28 is installed in the correct location
(on the Minitower, the correct location is “PS/2 Supply”; on
the Desktop, the correct location is “MAC Supply”); other-
wise, continue to the next step.
5. Connect the black lead of the voltmeter to pin 16 of the power
supply connector. Connect the red lead of the voltmeter to pin
1 of the 20-pin power supply cable. The voltmeter should