HP-67 - 1705S02263 - Full Repair Advice Requested (was HP-67 - strange behavior)

[albertofenini]

ciao Tony,
consider that this is what we get with a fully working CPU board taken from another unit,
this particular calculator is to be totally repaired, the CPU board is only partially working
and so is the card reader.
Considering that to get that display we used a working CPU board I think the culprit is
the RCA for segment C and F and of course the transistor which is totally missing because
it broke off.
We will replace the RCA and will post results
Then once the keyboard and the display is stable we will try to repair the logic board,
which is the one that only makes a flash unless we keep a key pressed before to turn it on
Take care and thanks for all the tips !