I've never heard of an LCD screen freezing. I have seen displays get "sluggish" in the cold and might seem to be damaged - but a little warmth and its back to normal.

Possibly the glass top layer of an LCD screen could contract enough to crack if it got really, really, cold. I'd love to do the experiment (with someone else's radio) but doubt that I could replicate that kind of environment at home. ;-)

- John OHM Ω