Left open in the rain


So 2 days ago my Jeep was left out and a nasty storm blew threw at 3am. Woke up at 5am and it was too late to do anything. The rain stopped around 6am and the first thing I did was disconnect the battery. Since then I’ve pulled the carpet and dried it all up. Put everything back today and reconnected the battery. Everything seems to work fine except for the backup camera. When I put it in reverse the radio stays on its normal screen and doesn’t even give me the black screen, I just see my radio. Any advice on what could be wrong?