Thank you! Based upon your suggestion, I was able to remove the clip and get the cover off. I subsequently removed the "relay" (PT??). There is no rattle or shaking noise, which based upon prior posts might indicate this part was shot. So now what?
Both sides of the unit (freezer and refrigerator) stopped working abruptly on Friday, and started getting warmer inside. The condenser fan is working and the coils are clean. No rattling in the compressor or sound of a mechanical failure in it. We started seeing water on the floor coming from the freezer side door, which probably meant melting of frozen moisture within it. I tried adjusting the temperatures to try to get the compressor to turn on, but no such luck.
Any more suggestions?