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I have an alarm system in my detached garage/shop with a screen on it, it is unheated, so I mounted a small 40 watt spot-light and have it shine on the alarm screen and keypad to keep it warm. I have a temperature activated plug on it to engage at 35 degrees. I really don't know if it is needed for correct operation, but it makes me feel better...
I would think if your Tv was 'freeze sensitive' it would have all kinds of warning notices on it when you buy it.
Dennis (Mudchief) has a company that sells an installs electronic equipment for law enforcement companies, I bet he has looked into this potential problem.
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