Samsung QM43B User Manual page 101

" For models with the DisplayPort
port only.
Other issue
There is no sound in HDMI mode.
HDMI-CEC does not work.
In power-saving mode, when the input source is
DisplayPort, PC display settings cannot be saved.
When booting the PC with the input source set to
DisplayPort, the BIOS and booting screens do not appear.
Displayed picture colors may not look normal. Video or sound may not be available. This can
occur if a source device that only supports an older version of the HDMI standard is connected
to the product.
If these issues occur, connect an audio cable along with the HDMI cable.
Some PC graphics cards may not automatically recognize HDMI signals that do not include
sound. In this case, manually select a sound input.
To use several external devices compatible with the HDMI-CEC feature that are connected to
the HDMI IN ports on the product, turn off the HDMI-CEC features on all the external devices.
External devices include Blu-ray and DVD players.
Operating an external device when its HDMI-CEC feature is enabled may automatically stop
other external devices.
To change HDMI-CEC settings, refer to the device user guide or contact the device manufacturer
for assistance.
Go to Menu → System → Power Control
configure the PC display output settings again. Ensure the product is turned on.
Boot the PC when the product is turned on or when the input source is not DisplayPort.
and set Max. Power Saving to Off. Alternatively,
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