New battery installed and no rear camera

Just had a new battery installed and noticed my backup camera not working. Shows nothing on the radio. It's a 2018 Sport. I know the rear camera worked the day before. Any ideas. I think I read a long time ago, you have to reset the front/rear camera on back of radio. But cannot confirm.

 

I have the Beatsonic Anytime Front Camera kit. I know on mine, Everytime the battery is disconnected and reconnected, then neither front or rear cameras work. I have to unplug the Anytime kit and connect the radio back to Stock form. Then start the truck and rear camera works. Then reconnect the Anytime Kit while the battery is still connected then it works again.

 

That done the trick as I have the BeatSonic Front/Rear kit as well. Thanks.

 

maybe you have to go into the head unit and turn it back on. I have to do this with my aftermarket HU