Calculator Woes: Dark Spots and Viscous Liquid on Screens.

[mfleming]

All LCD displays eventually fail. Storage in a cool dry place can help extend the life of a given calculator display. Most responses to a failing display is to replace it with a newer display from an identical or compatible donor. Naturally this involves disassembling one or both calculators that weren't designed to do so.

Welcome to the world of restoration Hope you learn much here...