Is the problems on newly added channels on ADTV? If yes then it seems you are facing problems in one of the new TPs that Airtel activated. I face similar problems in one of my connections. When technician came to visit he told me that the problem is not with my alignment but rather with the dual port lnb I was using. He told me that one of the ports is malfunctioning and the lnb needs replacing.
If the problem doesn't corrects itself I think you might have to call the technician as well.
Bro when the technician came I replaced the STB as well but that was because of some other reason (This problem is still there). Also when I changed the connections from the lnb the problem started in my other TV and corrected in the previous one, so for me atleast the problem wasn't with STB as such. The problem is with one of the LNB ports.
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