Why???? Spilled coffee on my keyboard and now the ‘d’-key don’t work. 😭Any ideas on why?
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You should open it up, take out those switches (at a minimum) and clean up the outside of everything.
It looks like a mechanical keyboard with standard Cherry MX style switches so you can swap damaged switches to keys you hardly use like function keys and buy a few new switches.
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The switches can be bought in packs of 10 for $1 each so it's not the end of the world if you ruined a few. You probably didn't actually ruin them. I bet you just need to clean the outside. It's pretty hard for stuff to actually get inside them since opening is on top + elevated.
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There's probably residue on the board short circuiting it and maybe on the switch contacts, etc. Definitely stop using it right away and get it opened up and cleaned up well. Use 99% isopropyl alcohol. I wouldn't bathe the switches in it because it'll screw up the lubrication.
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If you do need to replace some, you need to figure out if it's a plate (high end) or PCB mounted switch keyboard:
mechanicalkeyboards.com/shop/index.php
mechanicalkeyboards.com/shop/index.php
I doubt you need to replace them though. It's very likely just minor short circuiting on the board underneath.