Refrigerator problem

Thanks for all the feedback; much appreciated. To answer the questions raised 1) the unit hasn’t been running off level 2) I believe it is the original refrigerator and the rv is a 1994 model Fleetwood Southwind 3) shutdown occurs running electrical or propane 4) when the unit first stops running, the “check” light on the indicator lights near the top of the unit inside goes on - then awhile later the lights dim and the noise starts up. I know the unit isn’t working first when the “check” light goes on, then hearing the noise. The noise is definitely coming from the lower circuit board in the outside compartment. Thanks again for your time.