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Misconception #2: LCD TV sets last forever.
They say nothing lasts forever—and neither do LCD televisions. The average lifespan of an LCD display is 60,000 hours. If watching TV was your full-time job, and you did it 24 hours a day, it would take you almost 7 years to wear out your LCD display. With more normal viewing habits of, say, 8 hours per day, you can extend the lifespan of your TV by a decade or more (to about 20 years)!
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Well, we know that NOTHING lasts forever, so this would be a misconception about just about everything.
However, the LCD display itself will last pretty close to forever in human terms. Sort of like a transistor - will they fail? Yep. In your lifetime? Probably not. LCD display lifetime is probably in the millions of hours . . . which is close enough to forever for a consumer electronic product.
Now, the fluorescent backlight is a different matter. On average, they do indeed have a lifetime (actually a half life) of something on the order of 60,000 hours. And, most backlights can be replaced.