Hi,
I'm having a big problem with my sat system: In fact, a lot of channels are working fine (about 70% signal and 98% quality) but from 2 days now, I'm starting to get a quality issue. The green bar rises and drops every 3 or 5 seconds when I'm watching some channels on some frequencies like CNNI and Al Jazeera on Hotbird. The signal is flickering. Those channels were working really fine for ages now! But from 2 days I'm having a signal issue, and looks like it's propaging to other channels as well.

I live in a flat, no trees before the dish and all cables are pretty new and well connected.

Note: I'm only experiencing this issue with some (the number is increasing) channels.
For example the signal for CNN is jumping up and down from 100% to 0% and it's the same for others.

Can anyone assist please?