Possible Solutions
Kentucky_Bill,
Sorry for your frustration. Let's try again. Here is your manual:
[URL="http://63.148.251.135/redirect_service.cfm?type=own_manuals&file=SN29344940A_TX-SR507_577_En_web.pdf] TX-SR507 [/URL]
Here is where to download your Sharp TV manual:
http://www.sharpusa.com/CustomerSupport/ProductDownloads.aspx
Your LC-52SB57UN manual specifically:
http://www.sharpusa.com/~/media/633E83A5A6C14560A9ED94628C3AA08A.ashx
I have reread the thread several times and I am confused as to what you actually want to do (Sorry my fault) so I amgoing to give you two solutions.
(1) You don't have any speakers connected to the Onkyo 507 and want the sound to come from the TV speakers.
On page 76 of your manual you need to set AudioTVOut = "ON" the default is "OFF"
You will connect an HDMI source/s to Onkyo 507 then connect the Onkyo to TV via HDMI via one of the three input HDMI connections ( Input 6,7, or 8) This will work the same as if you had connected the input
source directly to the TV.
(2) You have speakers connected to the Onkyo 507 and you want the sound to come out of the Onkyo connected speakers and not the TV. Set the AudioTVOut to "OFF" The TV speakers will not receive an audio signal and will be quiet.
If you are connecting via either (1) or (2) and you get the error message and then the audio and video work as you expect, then it might be a Sharp TV firmware error. You can either contact Sharp or simply ignore the message.
Good Luck!
Forest Man