My DVD shows the same message from time to time. What I have done is release the parking brake and apply it several times and that seems to correct the issue. As for not playing on your toshiba it could be the video cables are not connected to the proper wires. I have read other people saying that the wires were not connected right. Read your radio manual and see if that is the case. It may even be not connected to the proper connection on the TV also. Good luck.
2013 Georgetown XL 378
2008 Honda CR-V