HP-71B LCD Problem! How Common?

[james summers]

Hi All

I think my HP71B has developed the same problem after being unused for a few years. I'm pretty sure when last used the display was fine.

Display after executing VER$


Display of my other (good) unit after executing VER$


Oblique view of my problem display showing some missing columns


Closeup of the affected area - display showing a sequential string of numbers with '2' to '6' affected


I'm guessing the best place to start looking is the bacon strip or the zebra strip? Mine is one of the plastic backed 71s.

Regards
James