Fridge stopped working, only compressor fan would come on. Changed starter relay and over load capacitor it's sounds like the compressor comes on now but nothing cools and the compressor just gets hot. There is a noise from the compressor and I do not recall it before, but it is away from the wall and open. Now I know the main board could be bad but I wonder if it's the compressor. Should I invest more money or get a new fridge. This is a 6 year old Samsung rb215.