Only backlight lcd

Hello, I have only backlight on my tester 8115. you have send me a new ic 4050 and that is not working ether. Is there somthing that i could have misplaced or somthing?
what i see is a light that have a little flickering. Is there a testing i could do fore checking the lcd screen? Is there a lak of solding?

thanks a lot fore you support.

Ton Ruiter