No Audio; Table 8-4: No Audio Checklist - PictureTel Concorde 4500 Administrator's Manual

RESOLVING PROBLEMS

No Audio

Table 8-4: No Audio Checklist

If you have these
symptoms...
No system sound.
A video image appears on
the monitor.
8-6
The following table summarizes the corrective actions that you can
take if you have no audio.
1. If the far-end keypad is a tethered keypad, make sure that
the INT MIC switch on the back side of the keypad is set to
ON .
2. Check to see if the far end is muted.
3. Press the volume up/down button on the keypad.
4. Make sure that these cables are securely connected:
PowerMic cables to the electronics module
Near- and far-end monitor audio cables
Bose speaker to the electronics module
5. Isolate the problem to the electronics module by performing
a local channel loopback test or a video-audio loopback test
at both sites.
6. Perform the Video-Audio Test Pattern at both sites.
If you do not hear the tone, you may have a defective Audio
board. If you do hear the tone, you may have a defective
microphone.
If at the end of these steps you still do not hear any audio or
you have located the defective part, call your authorized
PictureTel service provider.
Do this...