External MFD screens colours different/dim. Why?

[Aspiteri9]

Hi all.

Have been having trouble with this screen on the left.  I have had on and off trouble with these screens for years.  Even replacing one or both(cant remember.

Left one seems to often have this incorrect colour problem. 

With the F16 MFD exported it doesn't show red. With an F18 MFD export it is so dim I can't use it.

I've played with all the settings.  But I have a feeling it is a hardware problem.

Off the top of your head, has anyone seen or know how to rectify?

Thanks

Edited 23 hours ago by Aspiteri9