How to turn on the display?

I am using Colibri VF61 and we had to cold boot it. After turning on I can see the bootloading screen but after that display is in turned-off state. But if I connect to module via USB to my PC and use the Remote Display Tool, the screen shows up on the Remote Display Tool.

I went through the article Display Driver Registry Settings but I don’t know exactly which setting to change and to value to turn the display back on.

Any help is highly appreciated. Thank you.