im using my samsung s7+ tablet's cover keyboard and the mouse pad just isnt working for me. i went through my settings, ive tried pressing Fn and the spacebar at the same time and holding it but nothing happened. the keys are working just fine, im even typing with them now, but the mouse pad will not work.
One thing to try, check the pins that attach to the tablet check both pins on both keyboard and tablet and see if they're clean, dirty contacts could have connection problems, or, if the keyboard is Bluetooth try reset the device by fully unpairing it and pairing it again.
Another thing to try: Restart your tablet, push and hold the power key until 3 options appear press the green restart option.