We have a older True Cooler, that has been making a funny ZZZ sound, not really an electrical short sound, but closer to a metalic ball berring sound, it did this for a second or two every time the compressor would turn on. Then last night it made a pop sound, and there was a bad odor. Not really an electrical smell, more like cardboard smell. Needless to say we unplugged it, moved the contents out. The fans start, but when I plug it in it makes that ZZZ sound for a second or two. Then a min or two later another ZZZ sound for a second or two, on and on... like the compressor is trying to start. Not sure if this is the relay needing replacement or what. Any assistance would be great, thanks!

Refrigerators - True - G4SM-23 Refrigerator