26'' LG HDTV Weird Sound Problem

Hello. I have a weird sound-problem with my 26'' LG HDTV. When i play games, especially games with a camera you can rotate, the sound on the left speaker goes to the right, and is really weak. Then it comes back a little and centers "behind you", like it should. It's not like this on the other side. With music and movies the sound is fine. I have tried all sound-settings on the tv, no difference. I use a PS3 by the way. Any idea what the cause may be? Thank you in advance for any suggestions.