Forgive me because I'm not terribly familiar with the assembly, but did you disconnect a ribbon cable? An improperly seated cable could probably cause that.
I indeed check this ribbon cable multips times, but doesn't seem to be this issue, also doesn't change the view or anything...
Okay, well they can be a tad confusing. Are you sure you're reseating it properly? Can it be disconnected on both ends? A loose connection is the only cause I can think of for something like this.
Alternatively, maybe it was damaged during the repair?