HP-25 Co-luminous segments

[Tom Flatterhand]

(04-07-2022 06:25 AM)teenix Wrote:  Does this happen for all displayed digits or just ones with segA lit (top horizontal LED segment)

I have to thank! :-)

You have a correct guess. If one of the digits 1 or 4 are in the display, then the upper horizontal segment is not lit for these digits! Generalized: The upper segment lights only in the empty digits.