Samsung QN75QN8 B Series User Manual page 239

HDMI
HDMI HDMI
First disconnect and reconnect the power cables and HDMI cables on the back of your TV or the One Connect Box,
then unplug the power cord and plug it back into the wall outlet.
HDMI
If the external device supports 4K UHD or 8K UHD videos, use a dedicated HDMI cable for each resolution.
LAN HDMI Satellite
If you are using a set-top box, check the cable connection. The cable you need to check depends on the type of
set-top box.
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