50g screen issue

[franz.b]

bye! I purchased the specimen I was talking about with the missing line and I'll try to open it and check the contacts. The seller also gave me another 50g with a defect in the screen for an unmissable price, it has faded lines (or others too dark) and slightly flashing. it is not a disabling defect, with the right contrast it is invisible, but I wonder if it can be repaired by always acting on the contacts. I enclose the photos, the first with the display set to high contrast, the latter with low contrast.