We have just replaced our 7 year old Panasonic TV with a Panasonic Viera TX-40CX680B LED 4K Ultra HD Smart TV. The Humax worked fine with the old tv and although we have connected it using the same set up and hdmi cables, there is just a mass of moving colour dots when we try to use the Humax by switching tv to AV to then HDMI1. At the top it says "auto, 576i, wide" briefly. On the old tv I seem to remember it said 1080i? Tried using HDMI2 - no difference. Can anybody help? I am not a TV techie!