Help! My Monitors Go Black and Games Keep Crashing

I've been dealing with an annoying problem for months now. While gaming or watching videos on platforms like YouTube or Netflix, my cursor freezes for about five seconds, and then my monitors go black for another five seconds. After that, any game I'm playing crashes, and even AMD Software: Adrenaline Edition stops working. It's really frustrating! My system temperatures are normal, and all my cables are of good quality and relatively new — less than two years old. All connections are secure too. I ran a command in the prompt a few weeks ago that mentioned a memory leak, but it said it was fixed. After rebooting, the problem continued. I'm not sure if that's linked to this issue, but it might hint at a memory problem. I've also removed any overclocking settings, yet the black screen episodes still happen. So, I suspect it might be a GPU or memory issue. Any ideas on what could be going wrong?