Also noticed that there is no power on pin 4 on the docked RS232 port of my unit (Mk2, bought new last week). I read the other postings about this and thought that apart from some early MK2 units, pin 4 should be 12V(?). Serial number is 090000935.

IIRC, "early" in this case meant "one of the first 1000".

Borislav