Thanks for the input. None of the above worked, so Pi returned. After some testing I was sent a new Pi and HDMI cable: new Pi connected to TV normally, all colours correct.

I have tried the suggested permutations of hdmi_pixel_encoding: options 0, 1 & 2 still red; options 3 & 4 still a colour fault but red appears more pinky (?). TV tested with a different source: PVR in a different HDMI port works properly, Pi connected to same port using same cable PVR was attached t...

I had been using my new RPi2 for a week without problems: installed Raspbian from a pre-loaded SD card, HDMI connected straight to TV, plugged in to router and updated OS and programmes and was able to surf the web straight away and got the GPIO controlling LEDs. I was impressed with how easy all of...