I have now connected with the Hyperterminal, done the changes under properties and the ASCDII sending to "Send line ends with line feeds"

Pushed Open and entered:
%% - "Test Mode"
%p constable - "Error"
%z if - "Error"
%w - "Error"

Region 1 does still not play
Any idea what could be wrong?

My version of the 800 is 1.51 - could this be it?

861v4, 800v3, DynamicPrecicion A5+5.52H, Gradient mk2, Velodyne 1812 SE, Benq10000