Entertainment System Error Message
 

I just bought a 2003 MDX from a dealer who 'didn't notice the factory installed entertainment (DVD) system' when he advertised it. It did not come with the IR headphones. The system isn't working and I get an error message when I try to engage it (DVD error). I also get an 'Aux Error'. The manual says I need to bring it to the dealer, but I wondered if we needed to have the IR headphones on to have it work, or if there really is something wrong with the system...?