The television power-on sound comes from decades of home sets, where a physical switch, a degaussing coil on CRT models and warming electronics created a click, whine and faint crackle. As flat screens replaced tubes, editors kept a cleaned-up version as a stock effect because audiences still read it instantly. It spread through video editing libraries, meme templates and soundboards as a universal shorthand for turning something on, starting a broadcast or waking a screen, and remains common in skits, tech videos and nostalgic edits referencing older televisions.