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Hi
Do you have a Tivo by any chance? If so, this is a known problem.
If you call Tivo Customer Service, they will upload a patched software version (2.5.5a) to your Tivo which fixes it.
The problem is rogue teletext data from the Tivo is flooding the I2C bus in the TV which causes it to respond very slowly. Eventually, the TV can crash and will shut down.
The software patch disables the teletext subtitles on the Tivo.
If you haven't got a Tivo, try unplugging your other devices one at a time.
There could be a problem with the AVLink signals coming from a dodgy piece of equipment.
Steve
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