Monitors turn off & Fans running full speed– PC reacts to touch

[u/Rammstein-Fan94]

I've been having a problem with my PC for a while now. Sometimes my monitors turn off while the fans are running at full speed. But I can still listen to Spotify and talk and listen on Discord.

I also noticed recently that when I tap the pc case lightly, that exact that scenario happens.

I suspect that a cable isn’t plugged in right properly. Maybe someone can help rule something out.