Question: how to connect your laptop to your lg smart tv?
Answer: Press the SETTINGS button on your remote.
Use the ↑ , ↓ , ←, → or buttons to select NETWORK and press the OK button.
Press the ↑ , ↓ , ←, → buttons to select Wi–Fi Screen Share and then press the OK button.
Set Wi–Fi Screen Share to ON. ... 
Have your laptop run the Intel WiDi program.