Hi AirenPayne,

If this is EM interference, we can eliminate that easily. Disconnect the sound bar from the TV completely; turn the TV on get a channel that would previously seem to not work with the sound bar on. If the problem replicates itself, the sound bar somehow is interfering with the signal. If it doesn't, then it's likely some connection to the TV is causing the problem. So I'd connect things up--one cable at a time--until you duplicate the behavior. Let me know what you discover.

HD Tech