Restoring/repairing/replacing classic series button contacts

[albertofenini]

It can be done, we did for an HP67 and for an HP25
You will need to pull gently a strip (I suggest an entire line) from the donor
Then you can remove the broken parts, in our case we replaced a complete line
of an HP67 and the donor was an HP45
Once cleaned the underneath, we pass the donor with a 2000 grit sand paper and
we solder the donor to the PCB.
Soldering has to be very thin so that it will not make difficult to close the chassis
You can view some pictures here :
https://www.icloud.com/sharedalbum/it-it...TcsmGlo5ca
take care !!