Magic Chef mini fridge starts and shuts off

Small Magi Chef refridgerator just starts and then shuts off every five minutes or so. When it starts you can feel the compressor lioke it is working then you see a small spark in the motor protector and it shuts off. I replaced the ptc relay but still same thing happens. What do you think the problem is?

Bad compressor.

Compressor probably draws high current when warm. Best to verify compressor still get’s voltage when it shuts down.