I've got a Logitech K520 wireless keyboard, and sometimes I notice that a keypress has not been registered although I'm certain I hit the correct key. After a small experiment, I see the behavior can be reproduced by holding down the SHIFT key and pressing the I and N keys at the same time. The same if holding down the SHIFT key and pressing the V and B keys at the same time.

I suppose this has something to do with how the key switches are read by the keyboard controller. But I've not been able to reproduce the problem on the keyboard of the laptop that the Logitech keyboard is connected to.

Is this due to hardware design in the Logitech keyboard, or is something else going on?

  • Is it just those three specific keys or a general problem with >2/3 keys pressed at once? – Seth Jul 5 '18 at 8:36
  • It seems to repeat across multiple "sets" of keys. But it's not a general problem, no. – Oystein Jul 5 '18 at 8:37
  • So its shift + I + N, right? Then its a hardware issue. I bet SHIFT + I +V won't work either. Every Logitech K520 will have this issue then. – LPChip Jul 5 '18 at 8:42
  • SHIFT+I+V works fine. But do you know what causes this? Some kind of mux reading of key switches perhaps? – Oystein Jul 5 '18 at 8:45

Try to press the keys that do not work in different spots, like on the edge or corner. This is a fairly common problem with these keyboards for some reason. My d key does it on mine. It simply will not work if pressed normally and I have to press it in the bottom right corner, in which case it works every time. It is a huge pain for games because of the whole wasd thing.

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