air play icon no longer displayed
I have been streaming from my 1-year old MacBook Air running OS X 10.9.4 to my apple tv 2 for over a year now. However a couple of days ago I have lost the air play icon from my top ribbon and have lost connection from the two devices. System Preferences > Displays is unable to detect the Apple TV device. I have tried solutions ranging from disk verifications/repairs using the disk doctor utility to re-loading OS X 10.9.4 with no joy. Can anyone suggest what has gone wrong and how to fix my MacBook Air and detect my Apple TV? thanks!