Screen sometimes blacks out when starting up game

When starting up Overwatch, sometimes the screen displays nothing but black and occasional flickering. It seems to be at random when it displays or not. The only solution has been to reset the computer’s power.

I made a previous thread about this but it stopped receiving responses. Listed on it are the computer’s specs and its prior steps taken to improve performance. I have already tried updating the BIOS, downloading Windows 10 updates, and updating my graphics card. Here is the prior thread: Screen does not display anything but flickering - #7 by Tukerscreatr-1882