Power connections SHALL be fully seated or you will encounter this issue.
No mystery here. You found the cause.
so I was using my computer and I got up (I think I moved the monitor a bit) and all of a sudden I hear a sizzling noise. i smell something burning near the connector to the back of my monitor, and I turn the screen slightly. no more sizzling. i then discovered the cord wasn't entirely plugged into the computer. it was half in half out, very loose. could the cause be that the connection wasn't fully completed creating a spark? or is there a deeper issue?