Well, to back up some, then, question your understanding that you only want to ground the shield at one end. This is not true of all kinds of shield connections. What makes you think it's true of this application?
And I should have started by asking what you mean by accidentally grounding the display end of the run? Were you trying not to ground both ends but you grounded both ends and you want us to figure out how you did it?
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
