is my lg television in 1080i?

Answer 1

Is that what is says? Your owner's manual will give you the
answer. You can also plug in your model number online and
find the features which will include the resolution capability.
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Answer 2

If it is an LCD, DLP or plasma, it may be 720p, 768p or 1080p, but it certainly isn't 1080i. All fixed-pixel displays are "p".

Answer 3

Hard to tell if you don't tell us the model number. Here's the link to LG electronic and you can check out your tv specificstion:

http://us.lge.com/products/category/list/main.jhtml