Question about Logitech diNovo LX300 Keyboard/Mouse

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Cordless keyboard keys

Mhy K key has disconnected. How do I reconnect it?

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  • pittp Mar 15, 2008

    my problem is not that the K key won't work, but that it has totally disconnected from the keyboard

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You should open the keyboard and clean the contect point of "k" key .If you have done this then check continuity of "k" key with other keys it must be broken.
Hope this solution works.

Posted on Mar 15, 2008

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Posted on Jan 02, 2017

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1 Answer

What is the problem why the arrow keys functioning differently.


Disconnect and reconnect your computer keyboard, then restart your computer.

Sometimes a poor connection can result in keys not working on your keyboard


Update the device driver for your keyboard by going to the manufacturer's website of your keyboard, and then download and install the latest driver matching the brand and model number of your keyboard.



Disconnect your keyboard from your computer and inspect the pins in the keyboard connector if you have a PS/2 connector.


The PS/2 connector for your keyboard has six pins, which connect into a PS/2 port of your personal computer, to allow for communication to and from your keyboard.


Straighten any bent pins you may find, by gently using a ballpoint pen.

You must replace your keyboard if you see broken pins.



Try testing your keys using a different application, such as another word processing program. Keys like the function keys on your keyboard labeled F1 through F12 may not work in one application but will work fine in another.


Clean Under Desktop Keys


Disconnect your standard desktop keyboard, then press down on a key not working.

Slip a car key or a flathead screwdriver underneath the key.

Twist the screwdriver or car key until the keyboard key pops off.


Use a damp cloth, moist cotton swabs or compressed air to remove dust, hair, and food crumbs under the key.


Use only water or rubbing alcohol to moisten the cloth and cotton swabs---other cleaners can damage the plastic of your computer.


Position and press down on the key to snap it into place.

Repeat this for all of the keys to clean underneath them, if necessary.


hope this helps

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1 Answer

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Disconnect the keyboard from the motherboard and then reconnect to the motherboard. If this does not work then the keyboard may be faulty and will require replacement.

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Hi I have exactly the same problem. Did you find a solution?
Please email me gygglechick@gmail.com

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change ur keyboard battery and then reconnect it will work...

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The keyboard is not recognized by your PC. By the way, do you have the software installer for your keyboard.? Run the installer in your PC, and try again
if it now recognize the keyboard.

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It's possible there is a mechanical problem with that key (broken, dirty).

But just in case you also use a usb keyboard with the laptop make sure that you did not disconnect (the usb keyboard) with the number lock engaged. If so you can either use the virtual keyboard to disengage the number lock or reconnect the usb keyboard and disengage the number lock. Then check if the problem is fixed when the usb keyboard is disconnected.

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Have you replace the batteries? If so try the following.
Normal 0 Press the Receiver button (and the lights will start flashing.
Then if the Keyboard isn't working, press the small RESET/CONNECT button on the back of the board to connect the keyboard to the receiver.

If the MOUSE isn’t working, push the small RESET/CONNECT button on the back of the mouse to connect to the receiver. Then they should work okay.
Hope this helps. Bud

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2 Answers

Keyboard not working


On another thread i found the solution:

[Ctrl]-[Alt]-[F12] (must use the left [Ctrl]-[Alt] keys, not the right)
Push the Connect button beneath the keyboard, then the Connect button on the USB Receiver, then the [Esc] key on the keyboard.

This will unlock the security encryption on the keyboard. You may need to reconnect the mouse afterward too.

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Is there an F-Lock or function lock key on the keyboard? If there is it needs to be on for the F keys to work as proper F keys.

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