I have an Apple tv2(mc572Ll/a) running version 4.4.4 of the software, connecting to an older Sharp Aquos LCD-26d6u TVvia a regular HDMI cable.
I used to be able to watch a rented movie until my onsitel technician/ teenager adjusted something.
Now when the preview plays the sound works. When a video is displayed using AirPlay from the iPhone the sound works.
But when the HD movie plays the message "an incompatible audio signal has been received. Check the output device settings" and there is no sound.
When I connect this to a newer HDTV the movie sound works.
Any suggestions on what Apple tv or tv settings to use to get the sound back (other than upgrading my technician/teenager/tv)?
Try adjusting the audio out and/or Dolby digital settings (settings > audio & video)