I have tried this but will do it again now.
I have just re-plugged the TV and just the same. I did forget to mention when I switch on the TV there are two lights at the front, normally the larger top one lights up red and the standby goes from red to green when pressed. (I think)There is no sign of life from the larger one. I still get the radio channel and can work it backwards to select the channel I want which is usually number 1 !!!!
Thank you for your advice, I had a feeling that would be the response.