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When I do not create a keyboard event (i.e. pressing or releasing a key) for more than 5 seconds, the numlock and other LEDs on my keyboard go off. When I'm holding a key for more than 5 seconds and the keyboard 'shuts down', I also hear the device disconnected sound in Windows 8.1.
I've never had this until I got this new keyboard, a "microsoft wired keyboard 200". My USB mouse still seems to work properly even when the keyboard shuts down.
It's really annoying because I can't hold any key (including Shift or Backspace) for more than a few seconds and I constantly see the LEDs flashing.
When I press or release a button, the keyboard will go on instantly again, but when it's done by releasing a key, the "release event" will not be sent to the PC, causing the key to be "stuck" while it actually isn't pressed. This is solved by pressing it again.
Does anyone know a solution for this problem?