Has anyone any Idea how to fix this issue?    the RMU screen has blanked out,  regardless of several simulator reinstall attempts it still shows no display,   it used to work fine,   is there anyone who can help with this issue?

Which version of Windows?

 

Did you happen to do a screenshot of the overhead and main panels?

Try just loading the Tutor flight and see what the indications are when the aircraft first appears.

 

That would be a very simple first test.

Thanks for the input vonmar,   I was not able to a screenshot,   I could not get it to take,   what I did was fortunately I had a restore point available,  so I restored it to that point,  and it worked,  so I am glad that that issue has now been resolved.