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Samsung 4K HDR TV Setup Demo @ Samsung MU8800 Series 
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How Samsung TV Sets Up 4K HDR Signal Tutorials
If the LG and Panasonic TVs in the home are connected to a 4K HDR HDMI source, the 4K HDR screen cannot be output normally. This week, we will continue to discuss related issues and share the correct solution when Samsung and Sony TV encounter the same problem.
Set the demonstration model: Samsung MU8800 series.
If you find that the Samsung TV is outputting a 4K HDR source, there is no HDR next to the picture mode option, which means it cannot display HDR images normally. The solution is as follows:
Step 1: Check the "General" Settings Interface in the TV
Step 2: Open the "External Device Manager" interface.
Step 3: Select the "HDMI UHD Color" option.
Step 4: Selecting HDMI1 to HDMI4 will allow the HDMI input of the Samsung 4K HDR TV to support the reception of the highest quality video signal.
After watching the picture mode option, or pressing the remote control select button to display detailed program information, you should see the HDR signal in the output.