LG fridge suddenly stopped cooling.

Question

My fridge is an LG with the Top-fridge bottom-freezer style. It is a 2004 and recently stopped cooling for no reason. My only guess is a power surge. I unplugged it for 15 minutes and then plugged it back in. The fan runs and the lights work. The cooler even sounds like it kicks in but the air that is blowing into the freezer is warm air. Any ideas about what to check or adjust?