Wow- I would not risk it, but you can try asking the TV gurus at avsforum.com.
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The last time I moved it was in December. I live in Canada where it can get a bit chilly. My stuff was in his truck in cold weather for close to a week. Upon delivery and unloading, the driver specifically warned that I not use any electronic equipment such as my TV for at least a day after it returned to room temperature. In very cold weather, as equipment warms up, you can get condenstation in the equipment, especially on little metal parts. Until it evaporates, the water can cause significant damage. The driver said his company had customers whose TVs were damaged and even caught fire when they were used before they defrosted. I would also think that the cold weather would adversely affect the picture quality since LCDs use fluorescent backlighting. Anybody who uses fluorescent lights in cold weather, like in my unheated garage, knows thay they take a bit of time to recover their brightness when it is cold.
Thanks everyone. I actually go there just as much in the winter as the summmer. As does Maineiac, I leave my crt, marantz receiver, sat receiver etc... and have had no problems. I do warm the place up before turning anything on. I believe Mark's comment makes perfect sence although it's not what I wanted to hear. I'd better do some research and try to find an alternate plan.
Some manufacturers provides specs on operating temperature ranges and storage ranges. 20 to 30 below is probably well below what the manufacturer would recommends, but that doesn't mean your LCD will not function (if allowed to warm up). I just can't imagine that extreme low temperatures won't have an effect on longevity and optimal performance.
On a more positive note, you could always sell it as a cryo'd unit.