Sony Surround Sound, LG TV and PS3 connection problems

SOURCE: ps3 Surround sound

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SOURCE: no sound from ps3 to home cinema via an optical cable

If you have not run the set up you will need to, however I'm guessing you did because you would have had to make some changes to the settings to get the image to come up on the screen but without being physically at your location I can just guess.

In order to view your PS3 in full 1080p you need the HDMI cable which you already have. If you have not gone into your video settings then you are not viewing via the HDMI cable and you will need to to get things working right.
In order to view via the HDMI cable you would have had to had both the standard PS3 interface cable that comes in the box (the one that goes from the PS3 to your tv with the composite video (yellow) and the left and right audio (red and white) and the HDMI cable pluged into your PS3 and your tv at the same time. then you turn on the PS3 making sure your TV was set to whatever imput the composite and left/right audio is pluged into (typically VIDEO 1,2,3 ect.) and enter the menu, go to the settings and then down to your display settings and change it to HDMI, the image should then leave the screen (because it switched to HDMI) you will need to have your TV remote handy for this because you will need to switch sources on your tv to HDMI 1,2,3 ect, which ever one you have it pluged into. When you have switched to the right HDMI imput there should be an on the screen that is counting down and asking you if you want to accept the changes. Select yes and Move on through the settings selecting the maximum resolution your tv is capeable of
720, 1080i, 1080p) which can be found on the box the tv came in or somewhere on the tv or manual. While running this settings change it should ask you the audio source you are using make sure you select Digital Optical and that it is pluged in to you PS3 and your reciever. Once this is all done you can remeove the standard PS3 hook up that came with the box and put it away you wont need it any more, unless you move the PS3 around and the tv you move it to does not have HDMI in which case you will have to change the settings before you move it back to the standard cable or you will not be able to see it displayed on the tv sceen you move to and it will be impossible to run the settings.

If you have already done that and just want to verify that your source for audio originating from the PS3 is digital optical you can check that in the same settings menu under audio settings. Then make sure the reciver is on and set to whatever imput you have the cable pluged into and you should be good to go.

If all that I have described has been done already then the audio cable could be bad or the problem lies internaly with the PS3 or the reciever.
Good Luck hope this helps

SOURCE: PS3 surround sound

You will need the optical cable. My receiver only passes video through the hdmi. So I hooked up the HDMI cable to the tv, and the optical cable to the receiver. Once that is done you have to go to the audio settings for the PS3 and chose audio through the optical.