Hi!
Thanks for your advise. I tried to reset the TV, reset the magic remote by take out the batteries for 30 mins and put them back and long press the "EXIT" button. I also tried to select the country manually, however, the TV still said "only specific model of remote can be paired". I've no idea and call the customer service support and she told me that my TV does not support this magic remote and suggest me to buy a New magic remote. I had been using this magic remote for over 3 years! Isn't it the earlier firmware releases got "Bug" and so allow to pair this unauthorized magic remote incorrectly?
Im so disappointed to LG's service and desire dont buy any LG products anyway...
BTW, thanks for your kind help!