Maybe you could give us a little more info-
Is the fridge cold inside? or did it start malfunctioning as soon as you plugged it to shore power?
how long was it plugged in before it started beeping and flashing?specifically, what is flasing-the red triangle or other lights/numbers. the red light will flash if the fridge is set to propane and it will not light. It will try to light several times and then go to red flash.
Is the propane on? Have you set the fridge to propane or electric or battery(assume it is a 3 way or is it only 2 way?)?
the fridge will beep if the door is not completely closed.
maybe someone can help with more details
good luck
Vann