Mark Healey wrote:
I came across an old PC keyboard with a built in calculator (Focus
3001). The calculator appears to work but a lot of the segments on the
display don't.

Is it likely that the chambers with the liquid crystal stuff leaked or
broke down over the years.




It's likely that the zebra strip connecting the display to the circuit
board has gotten dirty or displaced, take it apart and clean it with
warm soapy water, careful not to stretch it out.