Logitech keyboard quit working

Take the battery(ies) out of the mouse. Move the controller to another USB port. Put the battery(ies) back in the mouse. It should connect. If not, Logitech has override procedures listed on their site. I can't tell you which one to use. You didn't list the mouse model.

the reset button is @ the bottom of the mouse

Hello Willy, hi, most likely its a circuit failure, so only the manufacturer can truthfully test the unit, have it returned to the dealer.and if its on warranty better.

i just got off the phone with logitech tech support about my 'dead keyboard'. I have a logitech wireless keyboard/mouse ex100. the mouse still worked and the keyboard just quit all of the sudden like. THE FIX! 1. Make sure in your device manager that the keyboard is still connected and working properly. if it is...
2. then remove the batteries and type on the keyboard for 10 seconds or so.
3. Then reinsert the batteries.
4. press the left alt key, left control key, and the f12 key all at the same time.
5. Then press the connect button on the reciever
6. press the connect button on the keyboard
7. press the escape button on the keyoard
8. test the keyboard
it worked for me :) that's how i was able to type this. hope it works for you

yes, usually on the bottom part of the mouse

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.
Hope this helps. Bud

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

maybe it is full of dust on those buttons. Try cleaning it with a duster of mini-brush because it interrupts the function.

I had exactly the same problem - ie Logitech MX3000 keyboard with remote mouse and only the "F mode" key and few others seemed to work around the top of the keyboard, but I don't think I had the SetPoint software. So I found it and downloaded it (www.logitech.com/setpoint).

As soon as it was installed I was asked to secure the keyboard by pressing ctrl alt and F12 and then I had to type in a 16 digit code (given on screen) and then my keyboard started working again.

I didn't have a spare keyboard so I used the on-screen keyboard (Start - All Programs - Accessories - Ease of Access - On-Screen Keyboard).

You don't need to install any software updates. Just do the following:

[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.