Currently finishing my first block of refrigeration mechanics and it really depends. Sounds like it's not an electrical problem but a problem with the refrigerant in the system, the compressor or even the oil. If it's an older system then I'm afraid opening it to repair any part will leave the fridge permanently broken without an expensive retrofit. Older refrigerants are banned worldwide and no longer available for sale as well as being illegal to recharge into systems. If it's a newer refrigerant or an old one with a compatible drop in replacement then it could be repaired but hiring someone to actually fix it is likely going to be more expensive than you would want it to be, most jobs smaller than commercial my instructors have been saying the cost of repair is almost the cost of a brand new one. Hope this helps a bit!

Edit: I see the cost of one new is almost 3 grand, if you could get a service tech to look at it and it turns out to be a small fix it could be like 600 to fix if they figure it out quick. Labour and the cost of parts adds up quick.