Thanks for your input guys have now got it sorted by using a different HDMI port on the TV.
For information (back to the TV manual) one of the Panasonic TV HDMI ports is positioned in a different area and interlinked with S-VID and two audio inputs.
Whilst I now have video (absolutely brilliant picture over a 30 ft cable) I do not yet have audio but believe it just means trailing another cable into the audio jacks.
Dave