>>...Notice that most shops shwos cartoons which will make even a bad TV look good.
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>Really you right. I didn't think about that...
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>One disadvantage with LCD TVs is that they have two vulnerable parts, namely the backlight lamps and the inverters which drive these lamps. In some never LCD TVs these two units are replaced by white LEDs which last "forever", but they are relatively expensive.
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>I didn't know that. That's really a good information. Thanks... So how can I know that? I'm sure if I ask a seller will say "It has white led".

They will most likely show this on the sticker on the TV, because it should be an important feature. The LEDs will also ensure that the TV is colder and consume less ower. You will also be able to see that the backlight is spread differently when you look closely, but to be honest I am not absolutely sure how you will see this. I will have a look in some shops tomorrow.