Some of the colors weren't working on the Monitor. I found pressing around the plastic border of the screen brought them back. I opened the monitor casing and used the folded paper to put pressure against the LCD panel and housing. Wah Lah. More of a bend than a hack I guess.
Great! For how long did that solve the problem? 
At least a year. After that, the company went out of business. For all I know whoever we auctioned those NCR system's to are still using it!