Hi, thanks for using JustAnswer.com. I looked at your original thread and there is nothing additional there. Not sure how you tried to contact me, but this is the first I have heard from you since your past post on the other thread. What can I help you with?
Did you install the other board you said you still have? The display board feeds off the lower board according to the service manual. If you have the other board, try swapping it for the new one you have and see what happens.