Are the video codecs you're trying to play match up with the supported formats as listed in the manual? All three have to match - the codec, resolution and audio codec.
So, I have a LN46B650 TV and I am trying to use LinkStick and DLNA to share and play files that are on my PC. Audio and picture files seem to work fine, but I'm having problems with video files: the video will play normally for a few seconds, but then the image will just freeze up and the TV will be totally unresponsive for a minute or two. The TV will then shut down or revert back to a standard tv channel. Anyone know what's wrong? I'm wondering if maybe I don't have enough free space on my PC for video files to run properly or if I'm sharing too many files. Thoughts? Thanks.