I am having some difficulties. I have a failing CTC P50-21AR-A. I am trying to find any resources of knowledge on what older CTC display would be an adequate replacement for this display. I found a CTC p51-3c2-a1-2a3 but I cannot find any information as to what I would have to do to use this one in place of my older one. (i.e. software ect.) Any help or referances would be greatly appreciated. Thank you in advance.