Does the following link present the User Manual for your TV?
http/www.lg.com/us/support/products/documents/55%2065LF5700%20Owner%20Manual%20v4.pdf
Wireless and internet instructions begin on Page 32.
Look at the status lights per Page 43.
Additional settings information beginning on Page 63.
If the above actions do not resolve the problem do a reset following the instructions beginning on Page 67.
Troubleshooting guidelines begin on Page 71.
Objective is to eliminate as many possible causes as you can.
Could well be that the "Select" (OK) button is faulty.
And remember to try a phone app if at all possible.