Apple powermac g3 blue.white Service Manual

 

 Troubleshooting

General/Power Supply Verification - 21

 

The Power Macintosh G3 (Blue and White) logic board requires a 

“trickle” power of +5V to start up. If the system fails to start up, 

follow the procedure outlined below to determine whether the 

problem is related to the power supply.

 

 To verify the power supply, you will need a volt meter.

 

Follow the procedures in the Take Apart chapter to access the 

power supply.

 

  For this verification procedure when connecting the 

volt meter leads to specific pins, ensure the power supply cable 

remains securely plugged into the power supply 20-pin 

connector on the logic board.