HP-65 - 1604S01786 - Display faulty or Drivers faulty ?

[teenix]

(02-18-2020 09:57 PM)albertofenini Wrote:  We will be happy to do it
And we are curious too
Is the pin we mentioned the right one to measure ?
Let us know
Take care !

Hi Alberto,

Probably not much value now because the fault has been removed. I guess there is no point now risking damage to a newly working calculator.

It is hard too see why a digit mid display would be ghosting due to a faulty display module. The only thing I can think of is one or more LED segments went faulty and perhaps lost some of their diode properties causing small leakage currents to flow.

cheers

Tony