Hi! Here is a "fix" for P3D v4.1 and FSXBA 17.1.31 that many may know about, but as some here are asking for black MFDs fix...
So here it is as a provisory fix (mostly aesthetic fix but some of it indeed also work) - (Thanks to creepy847 and his youtube video about this fix)
1) of course think to copy FCS files from "For P3d v4" folder (in Panel.Fleet) to Panel.BA/Panel.Fleet folder so the HUD don't display the red FCS error.
2) download this free fsx F/A-18E model :
https://flyawaysimulation.com/downloads/files/23768/fsx-fa-18e-super-hornet-updated/3) unzip it and copy the superh.CAB file from this plane's gauges folder to your FSXBA panel folder (Panel.BA/Panel.Fleet)
4) than edit your panel.CFG (in Panel.BA/Panel.Fleet, make a copy first for saving original) and go under [Vcockpit01], there you have to replace the 3 lines under //DEFAULT AVIONICS by :
gauge00=superh!rader, 450,4,440,440, 1
gauge01=superh!eng.mfd, 4,452,440,440, 2
gauge02=superh!hsi, 4,4,440,440, 3
(you can change "rader" (yes rader) by "Primary Flight Display", and "hsi" by "ufcd ap" to have other pages displayed that are more fps friendly than hsi GPS map and Air-Air radar)
You can see result on creepy847's video :
Big up to jimi08 and FSXBA team !