Frigidaire Stove Display Board Help

[NickWC]

I am having some trouble repairing a customer's Frigidaire oven display board. (M: CPEF3077QFA)

The old board intermittenly stops functioning properly so I am going to change it out for a new board. However when I change the new board in it fails to light up. It makes noises and and you can make some inputs, but it fails to light up. The first time I had this I assumed I had a bad board and ordered a new part, but since this has happened twice I doubt I received two bad boards in a row. I am certain I am wiring it correctly as both boards have the same layout for the wires.

Any ideas on what the problem could be? Do I need to change the control board at the same time? Is there a trick to this I don't know? Any advice is welcome.

The part number for the old board is (ELUH020) and the part number for the new board is (ELUH120). 

[NickWC]

Part numbers are old: 808751510 and new: 808751525

[evaappliance]

3 hours ago, NickWC said:

I received two bad boards

never underestimate their ability to make a bad run of boards , that being said   316472807 this is the board number i came up with,  5304505475 is the display / user interface  number i came up with

[Pcombs]

How many boards did you go through? I have 2 new ones & I am having the same issue with the exact same model stove. Thanks.

[16345Ed]

Is main board supplying proper power to display board? You never talk about testing…

[RiverbendAppliance]

Any updates for this issue? I'm having the same thing here.

Model : CPEF3077QFG

Orig UI : 808751513

Replacement (new) UI : 808751525

Customer states intermittent F16 error although I have not observed the error myself as it is always working when I arrive.

Ordered and went to replace UI and it will not display anything when power is applied. I put old UI in and it works as it should.

When new UI is installed : I apply power, no display, no beeps. when I push the clock button, I get 3 fast higher pitched beeps. nothing else

When I reinstall old UI : I apply power, display comes on and immediately 3 medium pitch, medium speed beeps. At this point I can set the clock and everything is fine.

I went back and forth between the old and new UI and this was the case each time, so I'm getting power to the UI and have no reason to suspect any other issues to cause the new UI from not turning on the display. 

Only thing I can think of would be a software issue where new UI not talking to the old main PCB, but no other info out there to suggest that both need to be replaced at the same time.  Hoping that someone may have some more insight so I don't have to try and sell a new main PCB without knowing for sure.