Hi All Hoping somebody might have a bright idea to help me fix an annoying issue with my 65" HiSense TV. It is a 65N7... only a month or two old. The problem I have is a persistent buzzing / humming sound when my Foxtel (cable TV) box is connected. The buzzing does not happen at any other time or with anything else connected. However, the Foxtel box has been troubleshooted - and replaced - twice so the box is not the issue. I have replaced pretty much everything possible - HDMI cables, power cables, resets.... the lot. I just can't get rid of the buzzing / humming. Any ideas?