Air Play icon disappears after a few seconds of opening ports in router settings.
The AIr Play icon no longer consistently appears on my iMac or my iPad. Apple TV is 3rd gen, iPad is 4th gen, iMac is latest (2012) router being used is Linksys (Cisco) E3000. Opened TCP ports 123, 3689, and UDP 5353, and after saving the router settings, the Air Play icon appeared on iPad but disappeared again after less than a minute. The Air Play also appeared on my iMac and when I clicked the rainbow wheel appeared and after less than a minte the Air Play icon vanished again. I have performed restores of the AppleTV both by using the iMac with a micro USB and also did a restore while connected to the television. Any other suggestions before I take it into the local Apple store? Thanks.
iMovie '08, Mac OS X (10.7.4)