UPDATE - after talking to the Epson tech over several phones calls ... I've head cleaned, nozzle checked, power cleaned, nozzle checked, pair cleaned, nozzle checked .... etc, etc, etc, you get the idea.
Now .... The black (MK) is working great ..... but the light cyan (LC) has gone out in sympathy .... grrrr .... Epson tech seems to think it maybe a pump problem .... oh joy!
will let you how things go ...
David