Display driver problem

Everything about 41C 41CV and 41CX Hardware

Display driver problem

Postby DanLins » Fri Jul 22, 2022 3:36 pm

My trusty 42 year old 41C has a display problem: when powered on, it blinks the display briefly and then goes blank. Quickly holding down nearly nearly any key shows the function or key pressed, but when released, the display quickly fades away again.

New batteries. Does this seem like the U2 is possibly bad? Or C2, the 470 pF cap? My U2 is marked 1826 0566D (Rayovac)

Anyone have insight on this?


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Joined: Fri Jul 22, 2022 3:14 pm

Re: Display driver problem

Postby floppy_stuttgart » Tue Aug 16, 2022 10:00 am

Contact the guys there: https://www.thecalculatorstore.com/
They are now my benchmark (after several tries at another place) in repairing HP41.
Perhaps they can give a "remote diagnosis" or just send the part to them?
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