Apple powermac g3 blue.white Service Manual

 

 Troubleshooting

General/Processor and Jumper Block - 13

 

The logic board comes with a removable processor module. The 

processor should rarely fail and should be replaced only as a last 

resort. Processor modules can be ordered from Service.

The jumper block you place at location J25 configures the board 

to work with different processor modules. Use the appropriate 

jumper block, identified by color, for each processor module. 

Yellow jumper: 450 MHz
White jumper: 400 MHz
Blue jumper: 350 MHz
Black jumper: 300 MHz

Note that when you replace the logic board on a Power Macintosh 

G3 (Blue and White), you must also change the processor jumper 

block and warranty sticker to be compatible with the processor