Sorry, but I don't have a PS3. If PS3 have Optical Out, you feed this to the HTIB Optical In using an optical cable/patch cord.
While for those sounds coming out (TV broadcast, or built-in media player) from this LED TV, I suppose only Audio Out (RCA) to connect to HTIB Audio In (RCA). Not sure though if this works this way. Haven't seen the user manual for this LED TV.
I suppose that your HTIB doesn't have HDMI In. Am assuming that you have Optical In and Audio In (RCA).