If you mean to say whether hot-swapping is recommended - then no. There is a good chance of short circuit to ground, which might indeed damage the tuner and/or LNB. Usually electronic components are protected against these human errors. But it's not worth anyway.
May be stb tuner problem when I connect old stb it has no problems and the technician checked with his meter it shows stable signal.But another thing that am noticed is that for some frequency there is no fluctuations in signal mpeg4 Tps.How a stb tuner get faulty-Any reasons