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HP38E wrong LED segments - Printable Version

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HP38E wrong LED segments - Hans-Peter - 10-26-2017 07:03 PM

Hello repair doctors
I have a 38E wich is very clean inside and looks like new. But on 2 3 4 and 7 is an additional segment bright.
Have any one a idea what can be defect?


Thanx for your help

RE: HP38E wrong LED segments - PANAMATIK - 10-27-2017 10:08 PM

(10-26-2017 07:03 PM)Hans-Peter Wrote:  Have any one a idea what can be defect?

I have an HP-21 display with a similar defect on some segments. I could be a degradation of the GaAS semiconductor substrate. No idea for a repair. You need a replacement from another calculator.