1. HAVE you had the recall done? IF not, then the original Hi temp disc will kill all power to the refer
2. IF the recall has been done and installed correctly, you will get a Li Op code on the inside control panel. 1211 models have that feature
3. As another poster stated, you need to check the 2 12 volt power supply wires at the outside rear access for 12 volts positive and Negative.
4. When you do that, look above the existing control box where the wires go on the bottom of the first round cooling unit coil for the Black 3 inch by 3 inch recall box. That is where it will be if the recall has been done.
5. Last, 120 power has nothing to do with the operational controls of the refer, so don't worry about that at this time. Doug