The manual that I linked you to lists "fuse" as possible cause for blinking and "audible" signal....which I assume is your beeping. It could also be caused by other problems, but note that it's listed for 120v and 12v, so, yes, I'm guessing that your fridge does require continuous 12v to operate. There must be a fuse somewhere in the RV for this circuit. I have 120v fuses and circuit breakers on my old PleasureWay RV. It looks to me that the main controlling circuit board requires 12v to maintain functioning in all modes (12v,120v and gas). I would be pouring over the RV to find those fuses and, as others have stated, replace them. It could be that lightning blew a fuse......or it might have destroyed a voltage sensitive circuit board. Does your RV have a basic manual that shows you where the fuses/circuit breakers are located? Mine is unclear but I found them by opening a door to the water heater (!) and by opening the voltage converter panel (mine is located under one of the beds). If you have breakers, click them off-on. A volt/ohm meter can be used to test the fuse but if you've located the fuse for the fridge, it's probably cheaper to replace. Sorry. I'm not a Dometic tech. Did you try calling their tech line? Worth a try if you haven't. I'll repost this on your other thread. Good luck.