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.
On a more positive note, you could always sell it as a cryo'd unit.