I hooked up a ps3 to my vizio 3d tv and tried to play a 3d blue ray dvd I have the hdmi cord but I get sound and picture when in hdmi. But when I put it on av connection I get picture but no sound.

SOURCE: hooking up a PS3 to my surround sound

you have to go to the set up menu and let the receiver know that you are inputting dvd audio to the digital in. (assigning). that way, when you switch the receiver to dvd, it will look for audio from the digital input. your receiver manual will guide you through that set-up.
if that does not work, the fiber optic cable could be bad. this is more common than people would expect.
another option is to just rca cables to the receiver from the ps3. there is an adapter that lets you do that.
good luck
mark

SOURCE: will not play Blue Ray DVD

I had the same problem. Try this. Contact Sharp and have them email you the firmware update. You will need to download it from the email and transfer it to the player via a flash drive. See if that works. I am about to return my Sharp Blu Ray player to Costco and go back to DVD. There seem to be a lot of problems with the technology. Even when movies start to play, they have freezes and it is sometimes hard to get the menu to show up

SOURCE: My lg blue ray dvd player wont play regular dvd's

sounds like a bad optic or a software issue

SOURCE: can you play regular dvd's on blue ray dvd

yes you can, it will upconvert them to 1080

SOURCE: Until a week ago our Magnavox NB500MG9 blue ray

goes to stopped after the disc loads