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HP 48SX screen annunciator area smear
06-05-2016, 01:26 AM
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HP 48SX screen annunciator area smear
My latest acquisition is an HP 48SX from 1990 that arrived today in near-mint condition. Apparently it was very little used in the last 26 years - even the rubber feet seem to have no wear. If not for the roughly engraved initials of a previous owner on the back, I'd call it unblemished. ...except for the very top of the display.

The portion outside of the dot-matrix screen where the annunciators are has obvious smears at each of the fixed positions. It's only apparent when power is applied, so it's not LCD leakage.

I tried to attach close-up images below that show the alpha annunciator area with power on when it's inactive and active, respectively. (Lately I've been unable to make images work in my posts.) With power off, there is nothing to see there.
       

Is this common? Do others have this? I've read complaints about the contrast of the screens of the 48S and 48SX, but I don't think this is related.
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HP 48SX screen annunciator area smear - striegel - 06-05-2016 01:26 AM
Ideas of what caused this? - striegel - 06-10-2016, 05:18 PM



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