HP-25 resurrection adventure – Part 1: The Keyboard

[metawops]

(09-20-2021 10:37 PM)teenix Wrote:  If the numbers work, and you say the [f] key seems to work, do the shifted functions work on the number keys?

If they do, then perhaps the other keys and the contacts between the circuit boards (including the holes in the board) need a good clean.

If not, then it could be a hardware issue. ie ROM, ACT etc.

cheers

Tony

Hi Tony & thanks for caring. ❤️
Nope, the f-shifted functions of the number keys don't work. They produce that "0.000000000", too.

I'm pretty sure now that this is either a bad ACT, ROM or RAM or a combination of these. Waiting for Bernhard to get through his emails after being away. Eager to hear what he thinks.