The TV and COBY are in the camper and not available to me right now. The yellow (according to the manual of the TV) is being put in a green hole. It is the first, left hole on the bottom row. The red is on the top, right and the white is to the left of the red.
I am not going to camp till Saturday. You have no idea at all what the problem is?
The coby worked perfectly with my old analog TV. Now with the new TV (which is HD) all I get is the sound - no picture.