I ended up picking up a bluetooth mechanical keyboard around 7 years ago. I’ve just dug it up again and I’ve realised that the bottom left “Ctrl” key is not working. What are my options for fixing it? I can easily take off the key caps and access the switches, but is there anything that can be done? Is there any chance reseating the switch will fix it?Thanks
Is it hotswap or are the switches soldered into the board? If the former then yes, first thing to try is re-seat the switch in the socket, check that a pin on the switch isn’t bent (and thus not inserting into the socket at all). The second thing to check (or first if soldered) is, using a multimeter, check continuity between the switch and its row/column and between the switch and its diode and check that it is working.
In either case, if re-seating isn’t enough, corrosion or oxidation could cause the behaviour. If hotswap, check for corrosion or oxidation on the switch contacts and the hotswap socket. gently try to remove any layer of oxidised material with something lightly abrasive like sand paper, or even just insert and remove it a few times to try to rub it off. Clean with isopropyl alcohol. If still not working try to reflow the solder joints.
If all that fails you may need to run a small wire to fix a broken or corroded connection but that’s unlikely I’d imagine.
Take it apart and see if the socket is loose. If it is get a soldering iron and fix it. Very easy many YouTube videos about it
