LCD displays don't like cold weather - it takes them quite some time to heat up to normal operating temperature. Had the same problem with my GPS when I was sailing south last fall.
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)