External Monitor is detected but displays black screen on MBP 15" 2017
While I'm not sure what you mean by a controller board (is it a video card or a dock?), Here's a few tips to try. 

Test the cable against other cables and inputs. I recently had a mini display cable go bad when it wasn't that old. 

Consider connecting the cable directly to the monitor if you are passing it through other devices (IF Thunderbolt > External HD > Monitor, INSTEAD Thunderbolt > Monitor). 

You could try resetting the NVRAM which would help your mac relearn your monitor. (Command Option P R after a cold 'Shutdown'). Google this for your specific OS.  

Typically, I find a black screen when the resolution of the mac is set too high for the monitor or the refresh rate is incorrect. Match what you know what your graphic card can handle to the limitation of the monitor. If the mac's display setting are vauge, there is a utility called SwitchResX that might be helpful. You can specify the resolution of your monitor and customize it with resolutions, color profiles and shortcuts. It's free to try with some nagware or feature limitations.