My Logitech keyboard MX3200 has stopped working. I changed battery no help. Pushed the connect button - no help Could I have turned it off by accident. I cannot move arround with arrows either.

you need to use your operating system to change the locoal country set up of your keyboard , most likely you need to chnage it from usa to uk

These devices will never auto connect after a battery change. You must press the button on the receiver then the red button on the mouse. Then the button on the receiver again, then the red button on the keyboard. The buttons on the devices (keyboard and mouse are on the bottom of the device.

There should be a reset button on the bottom of the mouse and keyboard, press and hold for 5 seconds with a ball-point pen.

I got a used MX3200, got the mouse working right off, but no keyboard. This solved my problem: with the wireless mouse working took out the keyboard batteries, pressed connect button on the receiver, replaced the keyboard batteries, pressed connect button on the keyboard. Voila!

Normal 0 Turn the mouse over and find the small rest/connect button on the bottom of the mouse and press it. This should connect the mouse to the receiver and work properly. If not, try pressing the receiver button and then press the button on the mouse. This should be done whenever you change batteries or glitch. Hope this helps you. Bud

I'm sure you replaced the batteries. If so you probably have a serious problem with the mouse. Bud

Normal 0 Normal 0 Press the Receiver button (and the lights will start flashing.
Then if it’s the Keyboard that isn't working, press the small RESET/CONNECT button on the back of the board to connect the keyboard to the receiver.
If it’s the MOUSE, push the small RESET/CONNECT button on the back of the mouse to connect. Then they should work okay. Hope this helps. Bud

Unplug the USB (or PS/2) plug for a couple of seconds and reconnect them. That worked for me when this happened on my older Logitech keyboard.

You probably already done this but try pressing the receiver button and while it is flashing turn the board over and press the small reset/connect button on the bottom of the board and also the reset/connect button on the bottom of the mouse. It should work okay after that. here is hoping that helps. Bud

Yes there is a red button under the left wrist support side.