APPLE TV
There is sound but no picture coming from IPAD to APPLE TV???
Apple TV, iOS 7.1.2
Has it ever worked?
iOS: Use AirPlay Mirroring
http://support.apple.com/kb/ht5209
iOS: Use AirPlay to wirelessly stream content
http://support.apple.com/kb/ht4437
iOS: Troubleshooting AirPlay and AirPlay Mirroring
http://support.apple.com/kb/TS4215
Try this - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.) No data/files will be erased. http://support.apple.com/kb/ht1430
Cheers, Tom 😉