Bob -Thanks for your suggestion, I changed the HDMI feed to the second option and the STB alert box does not now appear. So thank you. I have sent off for a 1.4a HDMI cable and will try that, although the contribution from HD Tech would suggest that it has to be an optical cable.
Thank you for your contribution, I did read in the manual that auto power should be enabled, but when I pressed that button it told me that this facility is not available. I will now check whether anynet+ is disabled.
While I have the chance, I would say that the manual with this television is the worse I have ever seen, it has hardly anything in it, it is sad that Samsung are cutting back on such a vital essential. At the age of 73 I obviously need a 14 year old around to programme the television as it is so complicated. The days of switching a tele. on straight out of the box and it working, have gone for ever.
However thank you for making a suggestion to my query, that is appreciated.