Hello,At first time, I speak English only a little bit. Sorry.My problem is:I load de PMDG 747-400 and at few seconds, the CRT's turn off.For exemple, the INBD CRT is black with a small yellow "MAP" at center.I am deinstaled a re-installed the Pmdg 747 but the problem continue.If i re-load the same plane again, the problem is solved, but is not good to load and reload the plane.I hope tha you can understand me an help me.Of course, my PMDG 737-600/700/800/900 and my PMDG 744 are purchasing at precisonmanuals web.Thnak you very much.J. Adolfo Medina

Sorry

You need to align the IRS. Try reading the manual about this topic.