everything is working fine but there is no backlight
i found a guide online wich fuse to change about backlight but when i opened my camera it was different motherboard (it did not have that fuse)
The only other way would be to make sure that you have the right manual and it would be helpful if you have the information on your logic board.
Anyhow I posted a service manual with corrections on my file server for you to download and check if it helps. Again, if you can provide more info on your logic board, that would be great.
Let me know if you have any furhter question, and good luck to you.