have you got microfilters on all sockets with equipment connected? I was called to a premises with this exact problem and a sky box was plugged into an extension without a filter. Once connected with the filter the problem disappeared.
Alienware 17 R4 2017 review
These brilliant Lego posters show just what children's imaginations are capable of
Mac power user tips and hidden tricks
Comment réinitialiser votre PC, ordinateur portable ou tablette Windows ?