I had the circuit board capacitor replaced. The entire refrigerator began to cool. It cooled to the recommended temperatures and continued to maintain that level of coolness for 12 hours. I figured that the problem was now fixed and decided to reattach the back panel cover.
I began to reattach the back panel to the refrigerator starting at the top half of the panel and removing down to the sides of the panel when the entire refrigerator stopped working. The lights and the temperature readings still worked. I attempted to run a diagnostic but the screen went blank - no responsive. I removed the back panel and could see that the back fan was not longer running.
I unplugged the refrigerator for about a 30 seconds, then replugged it. The back fan did not work. I heard clicking sounds but no movement. I also attempted to run a diagnostic but once I simultaneously pressed the On/Off and C buttons, the screen went blank again.
I unplugged the refrigerator again and left it unplugged for over an hour. I replugged the refrigerator and it started to cool again.
I have decided to leave the back panel un-attached to the refrigerator. Instead, I propped the back panel up against the wall (to protect the wall) and push the refrigerator appropriately 6 inches away from the back panel.
The refrigerator is cooling.