Answer:
The video card needs to be replaced
Step-by-step explanation:
The video card is a part of the motherboard that controls the graphic renderings of the computer. Once this is faulty, it can lead to several issues ranging from computer freezes or computer crashes to most commonly, laptop black screens.
The most common test to see if the "black screen fault" is from the video card, is to connect the laptop to another monitor that has its own graphics rendering instrument. If it works on that monitor, Then the video card of the laptop is the problem.
Since this is the case detailed in the problem above, the video card of the laptop needs to be replaced.