The solution has been to use the Apple adapter and not the Formac one which Jigsaw said would work. Apply supply the essential USB lead with the adapter and not the screen. Jigsaw swapped it over without problems.
The use of the f7 key seems to be a fairly perpetual feature.
Thanks to those who responded.
Bob Croxford
=============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
