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My calculator



#3

I bought an HP calculator 10 years ago and it still works but recently some unusual colours appeared on the display -like the rainbow.Can someone explain what can I do about it?


#4

Hi;

I guess it's an HP48S or SX; did I get it?

If so, chances are it's an aging process. I have an HP48SX and I bought it as soon as it was available (1990 - Serial # 3042A02xxx). It's LCD has a few small spots, and I believe it's an unreversible process. In my case, it seems a sort of a chemical reaction (oxidation, perhaps?) surrounding the right-shift annunciator. It's slowly advancing over the dot-matrix, but seems to be in a resting time... it's unchanged for about a month.

Yours seems to be a change in the reflected color (light). Seems to be harmless, I guess.

Sorry not helping that much. <:-(

Cheers.


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