I have 2 4100MPs plugged into a Dell GX260 PC with dual display card (one projector on each output). One one projector, I have a text box on the bottom of the screen which is recommending me to plug the video input into the blue VGA connector on the projector.  The display works fine and all is connected properly. I cannot remove the text message from the screen. I tried resetting and power cycle of the projector, but the text box remains.  Any suggestions?