Try AVSFORUM too.
I've got a 42'' LG TV. When playing films from the USB port (i.e. through a pen drive), I sometimes need to pause the film for approximately 10-15 minutes. After this time has elapsed, the film resumes on its own. It always happens, so is not something intermittent. After approximately 15 minutes or so, playback continues on its own.
I have gone through the options countless times, but have not found anything to turn it off - so unsure if it's a feature.
Any ideas what it could be? It's been driving me crazy!

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