No sound from Radio or DVD player

Has any one else encountered this. I seem to have no sound from the radio or DVD player. It was working fine I stopped as I got a slow puncture in the rear tyre. In order to release the hand brake I started the engine put the car in Neutral to no avail. I wanted to check where the puncture was

In the end had to take the whole wheel off as the puncture was in the inside side wall. Got the wheel replace and drove off put the radio on and since then no sound.

I did switch the car off whilst it was still in Neutral and notice the N light still on...

I tried the phone that seems to work so I'm getting sound from the speakers. Can anyone think off anything else I can check dealers are close unable to get a hold of anyone until tomorrow now, am hoping someone on here might have a fix

Thanks

Disconnect the car battery for a few minutes. Seems to fix a multitude of electrical glitches