Class A Troubleshooting for us Newbies

My wife I bought a 1999 National RV Class A Dolphin 5350 Motorhome with the Ford 6.8 liter V-10 Triton. It had 29K miles when we bought it. We are living in it fulltime. We gave up the place we were living in search of a relaxed and rent free existence. We knew nothing about motorhomes and have never owned of even been inside one. Its been almost a month now and although everything seemed to work in the beginning, it seems like nothing does now. Where to begin. The automatic leveling system. It worked the first time we turned it on. The panel lit up and we lowered and raised the metal legs or whatever they are called and when we were done we raised them up and turned the panel off. Today we tried to use them and nothing. The panel will not turn on, won't light up, seems dead. What happened? Did we blow a fuse, throw a breaker? Did it burn up, is it dead? What happened that it was working fine and then nothing? Please help us. We have many questions, this is just the first. We are out of our element, we know nothing, we are as green as the greenest grass on earth. But we want to learn, we have to learn, we are not going back to living in a $1,000 a month box. We are RV living now and not looking back. Please advise. Thank you