I'm thinking back to basic testing of dumb terminals and conecting pin 2 and
3 together would echo keyboard to screen.Google doesn't like the word exerciser. Is it possible to connect 5V to a pin on the monitor lead to get a blue screen or something even if not synced to save powering up a pc just to see if you get any sort of display on the screen?
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on