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I've been using the Logitech K800 keyboard with my Windows 10 desktop for a couple of years and now it has stopped typing one specific letter.

I've rebooted computer; I've unplugged keyboard for 30 seconds and plugged it back in. I've cleaned all around the keys with a soft brush.

What else can I do to get it to work?

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    Sounds like a hardware problem. Keyboards can fail in the way you describe.
    – Ramhound
    Commented Jan 13 at 4:25
  • Why not test it in another system? While I agree with others that it is probably a hardware problem, it is also possible that somehow you have configured it as a hotkey that does nothing.
    – Bib
    Commented Jan 13 at 12:00
  • does the failing key feel different from all of the other keys?
    – jsotola
    Commented Jan 13 at 22:19
  • 1. Try "canned air" to clean under the key. 2. Apparently, the key caps easily pop off, and you can try cleaning underneath. See Videos: youtube.com/watch?v=TaY8otYwnfI, youtube.com/watch?v=3Az3JoKNZuc and you likely can find others. Commented Jan 14 at 0:41

1 Answer 1

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That key failed.

If it's a mechanical one, and you happen to have a soldering iron and some soldering skills, you can try removing and soldering another keyswitch. More likely you should buy a new keyboard.

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