Entire refridgerator not cooling- Power verified to unit (120 VAC)

The entire unit is not cooling and digital display has different levels of intensity. The entire unit is running (evaporator, condenser, and compressor but not cooling. The unit is about 6 years old.
I have verified the following using the diagnostic mode:
Test mode: Activate – response
38: VCC compressor – starts and runs
12: VCC condenser fan – starts and runs
15: Evaporator fan – starts and runs
29: FF Thermistor – reading 65
30: FZ Thermistor – reading 63
33: Ambient Thermistor – reading 69

Initiated manual defrost and evaporator motor shutdown as expected

After reading anything I could find on the internet I am suspicious of the inverter board (especially with the display intensity variation)