My laptop screen goes black

I recently bought a Dell inspiron 15 3000. Everytime I open zoom, after using it for a certain while, my screen just goes black. The camera light stays on though. Sometimes if I just click twice on the power button, it resumes working. Other times I have to restart it and it resumes working like there was no error. I even did a colour bar test, but that showed no error.
 
Back