It doesn't appear to be a broken glass substrata, a straight bar across the screen isn't how that usually presents. It also looks like it is still functioning, except for the gray bar? I take it this bar appears in the same place on the screen, when you change pages?
The first thing might be to try and establish if it is hardware or firmware related. If it is otherwise functioning, it is probably easier to replace/fix the firmware. If it turns out to be the hardware then about all a user can try would be to check the screen ribbon connections.
Luck;
Ken
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