Rear Entertainment System DVD Screen went Black, Sound Still Works

We purchased a pre-owned Odyssey last year. The rear entertainment system has worked well, with no glitches. However, while playing a DVD recently, the screen suddenly went black. DVDs still play, and the sound to the system still works, but we can't get anything on the screen.

If this is a major problem, we won't be able to afford to fix it, so I'm hoping to find some simple solution! Has anyone else had this happen? Any ideas?

Thanks so much for any feedback!