Re: Fix/clean IBM model M

On Sat, 4 Apr 2026, adr wrote:
> This doesn't work that way, not with this kind of old-school
> keyboard.  With a new mechanical keyboard, you just unsolder or
> swap directly (hot swap they call it) the switcher of your faulty
> key, and there you go. Here all the keys form part of a single
> block. Look on internet, youtube, I'm pretty sure you'll find what
> I'm talking about.

Let me clarify it a little. In an old, cheap or laptop keyboard,
the switching occurs between two plastic circuits (membranes), the
keypad press a rubber layer in the point where touching the membranes
causes the circuit to close. The model m is similar, just a
buckling-spring is placed in each key socket to give a "feedback".
But the thing is built as a whole, using membranes. These plastic
circuits tend to erode with time, and if there is no replacement
the only solution is to rework the paths. When there is only a key
giving problems and you are lucky, cleaning with soapy water these
plastic circuits, wiping them with extremly care and placing them
back in perfect allineation, again, if you are lucky, can solve
the problem.

Until other key starts to fail... In a modern mechanical keyboard
the switching occurs inside an independent piece call the switcher.
Different colors correspond to different feedback. Nowdays these
pieces aren't even soldered, just fixed by pressure. You just pull
them out and push them in. So if a key doesn't work, most of the
time you just have to change the switcher. And the popularity of
certain models have created a quasi standard, so if you buy a
keyboard following those models and your fault is more serious,
you can just buy an new circuit board, or if you drop your keyboard
and break its case, you can buy a replacement (frame), etc. There
are a lot of options for different taste and badgets. All are
advantages and live is too short, take my advice, buy you a new
one.

adr.