Well, did one suggestion - - -unplug HDMI cable - - -didn't work, then unplugged - - -waited 10 seconds - - -plugged in - - -that did the trick - - -sound back on!!
MacBook Pro 15", Mac OS X (10.4.11)
Posted on Apr 22, 2013 6:53 PM
Q: Turned on apple tv first generation - - -no sound
that is unplugged the power - - -it worked.