No video output one game launches

[Petro1head]

The launcher starts ok

When I try single or multi player the track loads and progress bar moves along. One it gets to the end I get a blank screen and the goes back to windows dsktop.

When I check Task Manger rfactor2.exe is runnimg

I have tried the following:
updating the Nvidia drivers
I run tripple monitors so have tries 1920x108
Turned off AA
Done steam file verification
Hit t with a hammer

Any pointers I should look at

 

[Petro1head]

In case anyone else comes accross this.

This was due to Dec 2018 update

Delete file d3d9.dll in the Bin64 and Bin32 directories