Question What is that sound?

icarus2712

Honorable
Jul 6, 2018
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I have a decade-old dell studio 1555 laptop which I purchased second-hand.
I have observed there is a distinct click sound whenever it shuts down and displays go black. This happens even when the display times out on sleep mode and turns black..Low sound but there.

What could be it related to? I have had issues with the laptop shutting down randomly in windows 10 which is in control after I tweaked some power settings. Although it still shuts down when I boot a Linux in live USB.

Is that sound display hardware-related?