Hello, I just reinstalled my 747 and when I first load up the gauges display fine. However, when I turn on the Apu or start fspassengers the gauges turn black and there is no way to turn them back on. I never had this problem before. Can anyone help my by telling me what to do or tell me what I am doing wrong. Thank you.-Rob

Hi Rob, You may find that the gauges going blank is due to a valaidation issue. Try another reinstall of the 747 and if that fails, contact PMDG directly.More info here: http://ops.precisionmanuals.com/wiki/PMDG_..._and_ValidationCheers

Thanks for the quick response. The problem was an issue with my 737 and reinstalling it worked fine (I also think when I installed it before by firewall and other programs might have been interfering). So thanks for the help.