Radio stays the same...when a DVD is in, it will output, do not change to AV1 on the dash unit.
The TV source needs changed, needs to be either AV1 or AV2. check the back of the TV and make sure the cables are all pushed in all the way.
Sometimes a dealer will pull the TV's when on the lot. They may install the TV for sale, but forget to (or incorrectly) wire up the TV again.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).