Hi I'm John I will help you with the problem.
is the fridge just dead no noise at all is this the problem.
Please send me the model number and add a P in front of the model please.
This is the defrost timer its located in the same control panel as the thermostat .
the fridge is stuck in the defrost cycle and this timer has to be replaced or the thermostat has failed.
The control panel is the one where the thermostat is located the one you use to turn the fridge on and set the temperature.
If it came back on I would leave it to see if it happens again .
you know now how to set it to defrost so if it happens again do the same thing and then replace the timer.
Your very welcome ,
Thanks and God bless.