Macbook USB & External Screen Issue

[sparkytechwire]

Hi, I am using an external display and a USB docking station for my keyboard and mouse and have noticed that when doing so when pressing keys hard the screen goes black for a minute, could this be the USB docking station damaging the Macbook itself or something worse?
Help me

 

[Detrius]

What keys are you pressing hard, and what screen goes black? Maybe something is coming loose.

 

[Sonhascome]

What keys are you pressing hard, and what screen goes black? Maybe something is coming loose.

Yes, this sounds like a loose connection to me