Samsung QM49H User Manual page 124

Sound issue
Video is available but there is no sound.
There is static coming from the speakers.
There is audible sound when the volume is muted.
There is an echo sound coming from the speakers.
If an HDMI cable is connected, check the audio output settings on the PC.
Go to Sound and change Sound Output
If a source device is used
• Make sure the audio cable is properly connected to the audio input port on the product.
• Check the audio output settings for the source device.
(For example, if an HDMI cable is connected to the monitor, the audio setting for the
cable box may need to be changed to HDMI.)
If a DVI-HDMI cable is used, a separate audio cable is required.
If the product has a headphone port, make sure nothing is connected to it.
Reconnect the power cable to the device and then reboot the device.
Check the cable connection. Make sure a video cable is not connected to an audio input port.
Check the signal strength after connecting a cable.
Low signal level can cause corrupted sound.
When Sound Output is set to External, the volume button and mute function are disabled.
Adjust the volume for the external speakers.
Audio settings for main speakers are separate from the internal speakers on the product.
Changing or muting the volume on the product does not affect an external amplifier(decoder).
Different decoding speeds between the product speakers and external speakers can cause an
echo.
In this case, set Sound Output to External.
to Internal.
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