taking the A+ course, and in this video at ~19 minutes, Wes explains that monitors use AC, and so laptop monitors need an inverter. He then explains that desktop, in his words "full-size" monitors use a backlight inverter too, and goes on to give an anecdote of a diagnosis and I guess forgets to explain why desktop monitors have inverters. A ton of can't-stand-'ems in this video so I don't blame him.
Google tells me similar things about diagnosing/replacing the inverter board in monitors, and I've found sources saying that monitors need higher voltage than a PSU supplies.
Anyway, the question you've presumed by now: why do desktop monitors need an inverter unit if they're getting residential ~110-220 volt AC? I can't imagine they need more power than that - is it some kind of a stop-gap for regional variations in residential voltage? Am I missing something obvious? Should I go to bed?
Edit: I probably posted this in the wrong place, don't shoot me ibeg