I found mine to be sort of self inflicted. It seems lg decided to use flip up disconnect for all ribbon connectors except the one that goes to power switch/ IR. It is opposite so it was essentially disconnected. After I found that, everything worked. Thanks for response.
It did not work on my oled65c2 tv. I have replaced all boards twice. Is there normally a standby or power light close to switch?
TV comes on immediately upon plugging in with instructions to press wheel on remote.