Hello from JA
My name is Woody.
I will be glad to assist you today.
I have been servicing ALL Major Brands of Appliances for 35 Years,
and have over 100,000 in home repairs and over 80,000 internet repairs under my belt.
ok so the voltage to the unit is correct.
Can you remove the top panel and test voltage on the main control board?
If so test the Black wire on terminal # ***** to the White wire on P1-2 if you have 120 volts A/C
then you have a faulty control board.
And it will need to be replaced .
But before you order ANYTHING remove the light bulb to see if it is good ,because the control should not effect the light bulb from working unless the bulb is faulty or you have faulty door switch .
But neither the door switch or the light bulb will make the control board not give you a display .
so you actually have two different issues.
Let me know what you find I can give you a parts link also.