User Guide

Mac Pro (8x) Troubleshooting — Symptom Charts 155
Front Panel FireWire port
Reset SMC.1.
Reseat front panel board cables2.
Replace front panel board cables3.
Reseat front panel board 4.
Replace front panel board 5.
Replace logic board 6.
Rear FireWire port
Reset SMC.1.
Replace logic board 2.
Front Panel USB 2.0 port
Reseat front panel board cables1.
Replace front panel board cables2.
Reseat front panel board 3.
Replace front panel board 4.
Replace logic board 5.
Rear Panel USB 2.0 port
Replace logic board
Internal speaker
The Mac Pro (8x) should emit a startup chime through its internal speaker, regardless of 1.
whether headphones or external speakers are connected. If you hear a normal startup
chime, but no other audio is produced from the internal speaker, and there is nothing
connected to either audio-out port, suspect a damaged front panel headphone port or rear
audio-out port. In this case, replace the front panel board or logic board as necessary. If you
do not hear a startup chime through the internal speaker, even after resetting PRAM, follow
the steps below.
Check the sound output settings in the Sound preferences to ensure the internal speaker is 2.
selected.
Check speaker cable connection 3.
Replace speaker4.
Replace logic board 5.