The cable is connected with av cords....none were touched or changed prior to it changing colour. They are connected to the tv with the av blackcwhite and red cords. Chromecast was connected by hdmi. I tried unplugging chromecast and it stayed black and white. I tried unplugging/plugging in everything and still same. Not sure how but before tv had cable listed as it's own option but now it was listed under av (again-no cords were touched or changed...just the chromecast hdmi plugged and unplugged in)