HP-25 Keyboard fix, dissambely advice ?

[Geoff Quickfall]

As GreyUser accurately points out, the ‘pores’ are vias. I just didn’t want to assume everyone here including me is an electronics engineer ;-)

Just as the card reader does not have a clutch but rather a ‘dampening couple’ used to prevent vibration from the motor transferring to the card as it is read.

Cheers, Geoff