Samsung QB43N User Manual page 109

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Sound issue
Video is available but there is no sound.
There is static coming from the speakers.
Remote control issue
The remote control does not work.
If an HDMI cable or a DP 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 your monitor is connected to HDMI, you may need to change the audio
option of your video output device 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.
Make sure that the batteries are correctly in place (+/-).
Check if the batteries are flat.
Check for power failure.
Make sure that the power cord is connected.
Check for any special lighting or neon signs switched on in the vicinity.
to Internal.
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