Reply 22240 of 24423, by CrFr
Repaired and cleaned this IBM Model M2 today. It was pretty clean to start with, but it had couple of problems. One capacitor had leaked, and it also had bad connection between key mat ribbon cable and the PCB.
This is one of times when I should have done a bit of research before starting the project. Opened it, and all the fking springs scattered around the room 😁 Added fun was to figure out which holes are supposed to have springs. All of them are not populated. This must be the most annoying keyboard design I've ever opened. And of course leaked cap had eaten away the solder pads.
But in the end, result is nice. It works now, and looks like brand new keyboard. Sure it is probably one of the nastiest buckling spring keyboards, but I like how it sounds and feels.