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the picture will be distorted if the climate is sandy or very cool?

my satallite receiver was put at wood cabinet over the tv.
sometimes the pictures distorted if the climate is too cold, and if the climate is sandy also it will be distorted.
i tried to change by another one but the same result ,the brabd of the receiver is (hivion) model hv- 9090 x plus
ALI AMIN, May 2010