Apple powermac g3 blue.white Service Manual

 

 Hot Issues

Processor Module vs. Card - 2

 

Processor Module vs. Card

 

Whereas previous Power Macintosh computers featured a 

user-installable processor card, this logic board uses a 

processor module that must not be removed by the customer 

(see “Processor Module” in the Take Apart chapter).

 

Processor Module Jumper

 

The Power Macintosh G3/Macintosh Server G3 logic board 

has a processor module jumper installed at J25. The 

processor jumper is color coded for the speed of processor 

module used (yellow jumper for 450 MHz, white jumper 

for 400 MHz, blue jumper for 350 MHz, and black jumper 

for 300 MHz). Failure to install the correct jumper may 

result in a computer that won’t boot up. (See “Jumper 

Location”) in the Troubleshooting chapter.