My computer beeps and black screen

Sometimes, usually around night time, I'll hear a sudden beep sound coming from my computer. It's not a notification beep or an error beep. It's happened multiple times, and I'm not sure what's causing it. Sometimes the beep is accompanied by a brief black screen or a flicker, but other times it just disappears as quickly as it started.

The other issue my computer will go to a black screen for a few seconds before reverting back to normal. This has happened even when I'm in the middle of using the computer, and it's not related to any specific task or program. I've tried restarting my computer and checking for updates, but the issues persist. Has anyone else experienced anything similar.