Ir lg tv remote

I'm making a LG tv remote but not able to send ir signals
I decided the remote but the ir signals transmitted not working
I used NEC protocol
Any body help ma?

You need to provide more facts to get any help.
Different apparatus use different coding. Usually a general commercially built remote needs to be set up for the actual apparatus it will handle. There are lots of different set ups.
You need to find out what coding the actual LG uses.

Different manufacturers have different protocols for their IR remotes. NEC will probably not talk to LG.

A search for "lg ir remote protocol" might yield some information.