Connecting wireless keyboard to non Apple monitor I have just purchased a MacBook Air. I have a non Apple monitor that I wish to use. I have connected the Air and the monitor correctly. My Apple keyboard ( had a previous owner) will not work with the monitor or the Air? How do I get these to work?
Your Apple (Bluetooth) Keyboard doesn't connect to your monitor, but to your Mac. Open System Preferences and go to bluetooth, there you can connect new devices. Make sure the keyboard is on (there's a power button on the side) - a green LED in the top right of the keyboard (front) should light up when you turn it on.

Link: Apple's Support document with Screenshots.