So we know the DVD is playing, signal is going out. You should see two sets of cables.
1. there should be red/white in the audio/out section of the TV
2. there should be red/white/yellow going into A/V 1 or A/V 2.
Push up on the TV (it will snap our of the bracket) so you can check the cables.
Do you have a switch box below the TV? This changes things slightly.
If you have a satellite loop (small coax running from one plate to another plate about 6 inches away you should not have a switch box).
If the TV has all the cables, You may need to check the cables into the Magnadyne. You just use the U-hooks to pull the radio. Or take it to a dealer and have them troubleshoot it.
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).