Composite inputs result In Black & white image only

Astronaut

Composite inputs result In Black & white image only

[ Edited ]

I have a SUHD tv, model UN49MU7000,  that I purchased a month ago.  At first the composite input was working fine for both a DVD player and a Wii console. Then I unplug the DVD player, and plug in the Wii console, and now suddenly everything is in black-and-white. When I plug in the DVD player using the component input, it works fine. Does anyone have any ideas about what is going on? I did contact technical support and  went through some generic troubleshooting steps, and they said they would send me a new cable. I’m  just curious if anybody else has experienced similar issues.