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Display driver problem

PostPosted: Fri Jul 22, 2022 3:36 pm
by DanLins
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?

Thanks,

Dan

Re: Display driver problem

PostPosted: Tue Aug 16, 2022 10:00 am
by floppy_stuttgart
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?