Yamaha CX-A5100 Owner's Manual page 164

Problem
No sound from the TV (when HDMI Control is
used).
No sound from the Zone2 TV (connected to the
unit with HDMI).
Only the front speakers work on multichannel
audio.
Noise/hum is heard.
The sound is distorted.
The sound is interrupted.
Cause
The TV is set to output audio from the TV speakers.
A TV that does not support ARC is connected to the unit only with
an HDMI cable.
(If the TV is connected to the unit with an audio cable)
The TV audio input setting does not match the actual connection.
(If you are trying to use ARC)
ARC is disabled on the unit or TV.
The audio output from the HDMI OUT 2 (ZONE OUT) jack is
disabled.
The playback device is set to output 2-channel audio (such as
PCM) only.
The unit is too close to another digital or radio frequency device.
The cable connecting the unit and playback device is defective.
The volume of the unit is too high.
The input signal level is too high when AUDIO 4 (XLR) is selected
as the input source.
A device connected to the unit's output jacks is not turned on.
If the HDMI OUT 2 (ZONE OUT) jack is assigned to Zone2 or
Zone4, HDMI audio output may be interrupted during some zone
operations due to internal circuitry switching.
En
Remedy
Change the audio output setting on your TV so that the TV audio is output from the
speakers connected to the unit.
Use a digital optical cable to make an audio connection (p.33).
Use "TV Audio Input" in the "Setup" menu to select the correct audio input jack
(p.133).
Set "ARC" in the "Setup" menu to "On" (p.133). Also, enable ARC on the TV.
Set "Audio Output" in the "Setup" menu to "On" (p.139).
To check it, use "Audio Signal" in the "Information" menu (p.144). If necessary,
change the digital audio output setting on the playback device.
Move the unit further away from the device.
If there is no problem with the connection, replace with another cable.
Turn down the volume.
Adjust the output signal level on the playback device or use "Balance Input
Attenuator" in the "Input" menu (p.114).
Turn on all devices connected to the unit's output jacks.
For details, see "Connecting an HDMI-compatible device to play back
videos/audio" (p.98).
164