Thanks for all the replies. Just an update on my ST1000 problems.
The local repair guy gave me the name of the executive in charge in this area for ST1000. I emailed him with my problems. They have supplied my with a replacement which was used as a demo at boat shows and restarted the two year warranty, which I hope I do not have to use. I will be making a waterproof cover for this unit as other ST1000 users have suggested.
So, sometimes it pays to be persistent and patient. And hats off to Raymarine for supporting the ST1000.