Samsung ME75C User Manual page 228

Sound issue
There is audible sound when the volume is muted.
Sound from the monitor does not change after
is changed.
There is an echo sound coming from the speakers.
Remote control issue
The remote control does not work.
Source device issue
A beeping sound is heard when my PC is booting.
Speaker Select is set to External, the volume button and mute function are disabled.
When
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).
Sound Mode Audio settings for main speakers are separate from the internal speakers on the product.
Audio settings on a source device do not affect the internal speaker settings on the product.
Different decoding speeds between the product speakers and external speakers can cause an echo.
In this case, set Speaker Select
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.
If a beeping sound is heard when your PC is booting, have your PC serviced.
to External.
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