Then what you are reporting shouldn't happen, since display panels work just fine in KORD V2 with the latest Hotfix 3, as confirmed by Dave_YVR who posted before. Try the usual suggestion of refreshing the shaders, by removing this folder:
%LOCALAPPDATA%\Lockheed Martin\Prepar3d V4\Shaders
Then wait a minute or so ( there will be a black screen, it's normal ) for the scenery to come back again on the next start.
Also, be sure you don't have the "Disable RTT" option checked in the Addon Manager. By default is not checked in P3D 4.4 or 4.5, and unless you have problems with it ( for example using SLI ), it should always be unchecked, otherwise those panels and other things related to it won't work.