Hi All,Pmdg 747 : Set IRS POS and push the RTE button and all ROUTE data to enter.After activite button press. end EXC button or singed light after EXC button press and then FMC Screen is black (FMC see da blank screen to wit nothing anyone.)After the 2-3 second come in FMC screen.please help ;thanks;

I believe you are asking about the 2-3 second delay when updating the FMC? This is correct and follows the real aircraft.(Please remember to sign your name on your posts)