It sounds like there may be a problem with the POWER CONTROL BOARD.
Before anything else, I would advise that we make sure power is not an issue.
There will be a power control board on the back of the unit and the board will a pair of LEDS; one red and one green.
During normal operation, the LEDS should be steady and solid.
The red light would indicate that there is power to the board and in turn get power to your temp. display panel, all fan motors, and the interior led light.
The green would indicate that there is a "call for cooling" and in turn energize the cooling system
It should feel warm to the touch, if it feels room temperature or cold to the touch, chances are the cooling system will need replacing.
There is a service pdf available but this format wont allow me to add it.
I've added a pdf to assist
Microsoft Word - TEDs_service