Hp 50g vertical display problem

[Randall]

My 50g has developed between 1 and 3 vertical lines in the display. When present the lines run the entire length of the display and appear at the same location (so far).

Light pressure on the display or twist on the calculator (in the right place) will make the lines go away. The shade of the line(s) is white. And remains white whether that part of the display is blank or should be showing something. It seems the problem is caused by a bad connection to the display.

I replaced the batteries even though the low battery indication was not on. No change in symptoms.

Any suggestions?

Thanks Randy