I just plugged in an old CRT monitor (Samsung SM 753s). It works fine for a moment but now whenever I turn it off it would constantly and rapidly make clicking noises, and won't turn off. Had to unplug it. And it seems to be random. Sometimes it would turn off normally sometimes not. The noise sounds kinda like the click when I pick "Degauss" in its OSD. Any idea what might be causing this?