iMac G5, 17-inch Troubleshooting - 43
Symptom Charts
Speakers

I don’t hear sound from the speakers.

1. Press the F5 button on your keyboard. It has a sound icon on it. Do you hear sound
now?
Yes: It looks like your volume was muted. When this happens again, just press the
F4 and F5 keys to regulate your volume.
No: Are there any external microphones, speakers or headphones plugged into the
iMac? If yes, go on to step 2. If no, go on to step 3.
2. Disconnect your external microphones, speakers, or headphones. Do you hear sound
now?
Yes: It looks like the built-in speakers are working properly. Now try plugging in a
different set of speakers or headphones. Go on to step 4.
No: Unplug any USB devices you have plugged into your iMac except the mouse and
keyboard. Do you hear sound now? Go on to step 3.
3. Unplug any USB devices you have plugged into your iMac except the mouse and
keyboard. Do you hear sound now?
Yes: It sounds like you may have a USB Audio device plugged into your iMac such
as a USB microphone adapter or USB speakers. Please work with the manufacturer
to troubleshoot this issue.
No: Reset your computer's PRAM (Parameter RAM), which stores settings for sound
and go to step 5.
4. With new speakers or headphones plugged in, do you have audio?
Yes: It appears that the issue may be with the external microphone, speakers or
headphones that were plugged into your iMac originally. Work with the manufacturer
to troubleshoot the speakers or headphones
No: It looks like there may be something wrong with the audio output port on your
iMac. Replace the logic board.
5. After resetting the PRAM, do you hear sound now?
Yes: Test the audio again. Open System Preferences and check the Sound icon.
Make sure the preferences are set correctly. Problem resolved.
No: Replace the logic board