fridge not working all of a sudden

Are you running it on electric or gas? If running on gas is there propane in the tank?

What Brand/Model?

What does owners manual say about the flashing green light...it's an error code based on number of flashes per number of seconds etc.?

If it's a 'lock out' condition..........you can reset once by unplugging ALL power for 30 mins. then connect power and turn fridge on.
If it locks out a second time.......then you will need to do a 'hard reset'

Fridge is level correct?

Is your rig level? RV refrigerators need to be level to function.

Beyond that, check 12v fuse, 120v fridge breaker, and LP supply.