On Wed, 29 Jun 2016, Brendan McNeill wrote:
  Looking for a Tandy TRS-80 Model 2000 compute monitor.
Wikipedia
 description here:
 
https://en.wikipedia.org/wiki/Tandy_2000
 <https://en.wikipedia.org/wiki/Tandy_2000>
 The monochrome is model VM-1 Monitor, the colour is CM-1 Monitor. 
Does your system have the color video board installed? If not, you'll only
be able to use the monochrome monitor. I have a Model 2000 system in the
same state, no color video board fitted and in need of a monochrome
monitor.