light bulb and control lights all went out

The light bulb and the control lights for the fridge and the freezer all went out at the same time. I can replace the bulb if it’s bad but what about the temp control lights? I tried replacing all 3 light bulbs in the fridge side of the unit and when screwing in the last bulb the fridge and freezer temp lights go out on the control unit?

[CENTER]#19 controls the frig could be a failure in that[/CENTER]