The CRT TVs would last almost a life time. My last one lasted 30 years. But the new flat screens are rated something like five years or 50,000 hours. Some of the Plasma, high end, etc, much longer, 60,000 to 100,000 hours. Or that is what I have come to understand from many reading sources. The Vizio that I replaced, I am still using, but not as my main view any more, from what I have been able to figure, I am reaching the end of that 50,000 hours that the manufacturer said it would last. The blotched screen can be masked to a certain extent by adjusting the color and stuff. I will use it as a gaming TV so that it will die with honour.