One of the cost cutting decisions when designing the Model M was using plastic rivets. Some of these rivets break and the keys stop responding. My 1997 keyboard

One of the cost cutting decisions when designing the Model M was using plastic rivets. Some of these rivets break and the keys stop responding. My 1997 keyboard still have all the rivets intact, so I suppose that it might have to do with the treatment that the keyboard receives. This video shows how to replace the rivets with bolts: https://youtu.be/dStgzMpOTOA https://youtu.be/dStgzMpOTOA Sometimes the circuit board might fail too. You can find replacement boards for them too. My keyboard is a 4th generation, which is almost identical to the design sold by Unicomp today. The circuit board died last year and another Model M user designed a compatible circuit board that adds full programability with the QMK keyboard firmware, so I will install that one instead. In addition to programability (Win/Command key, international characters, emojis), the new board converts the keyboard to USB. So yeah, this circuit board really modernizes the keyboard. https://beta.docs.qmk.fm/ https://beta.docs.qmk.fm/