Can I Leave My Samsung LCD Monitor On 24/7?
You can leave your monitor on 24/7 if you want to as long as the image you display changes regularly or you use a screen saver. LCD monitors are subject to image burn in, so you don't want to leave a stationary image on your screen for long periods of time.
Also, note that the life expectancy of the backlights on LCD TFT monitors is 20,000 hours with 90% confidence. If you let your monitor run 24/7, you will reach that 20,000 hour life expectancy in about 2.25 years. If you run it only 10 hours a day, you'll reach the 20,000 hour life expectancy in about 5.5 years.