Specifications

Power Mac G5 (Late 2004) Troubleshooting - 10
Symptom Charts
Power-on LED does not illuminate when power button is pressed, but fans
spin, boot tone chimes, and there is video
1. Reseat front panel board cable
2. Replace front panel board cable
3. Test the front panel board and power button using the front panel board
troubleshooting tool. Refer to “Front Panel Board Troubleshooting” in this chapter. If
the computer starts up correctly, go to step 4. Otherwise, go to step 7.
4. Test whether the front panel board or power button is at fault. Remove the installed
front panel board and swap it for the known-good front panel board in the front panel
board troubleshooting tool. Then connect the troubleshooting tool to the logic board of
a known-good Power Mac G5 and start it up using the tool. If the computer does not
start up correctly, go to step 5. Otherwise, go to step 6.
5. Replace front panel board
6. Replace power button
7. Replace logic board
Other Failures
Power Mac G5 (Late 2004) 1.8GHz models stop responding randomly
See Knowledge Base article 302212.
Air deflector sensor board
1. Reseat air deflector sensor board cable
2. Replace air deflector sensor board
3. Replace logic board
4. Replace enclosure
Hard drive (kernel panics, hard drive does not mount, or performance slows
when second hard drive is installed)
1. Replace hard drive guide screws
2. Replace hard drive
Optical drive
1. Replace optical drive cable
2. Replace optical drive
3. Replace logic board