Hi Cristiano,
it's Automobilista that I am seeing this in, thanks for checking this out.
Also, just to correct what I originally reported, it's not the plugin configuration, actually I have to click on 'configure' on the main tab, which takes you to the brightness and data tabs, and then the pro race display lights up.
Here's an example of what usually happens as I did not describe it correctly at first.
I start SimDash15, and the display remains unlit.
I start Automobilista, and the display still remains unlit.
I alt/tab out and go to the main tab in SimDash, hit 'configure', then 'cancel', and the display lights up.
Then I can alt/tab back into game and all is well.
I hope that is of help.
Many thanks,
Keith