code 771, snow on receiver - DirecTV

i have a code 771, and after a big snowstorm yesterday, today there is only the advertising channels working, the rest say 771 code. can the snow that covers half the reciever cause this? its too high to reach to clean it off.
have checked the cable connection and unplugged the genie box to no avail. Any help??

This question, "code 771, snow on receiver," is about DirecTV channels, programming, equipment, and sports.
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