LG tv flashes logo on startup and then display stops working.

I have a LG 55LN5700 which flashes the logo on startup. I have attempted many solutions but all have failed. I have baked the main board, but to no avail. I have also cleaned all the connectors in case of dust. The red standby light is functioning and I think the main board is functional since the BGA chip heats up after the logo flashes. Also I can’t confirm if there is sound. I’ve also attempted the flashlight test and nothing seems to be on the screen. I also don’t have a multi-meter to check voltages. I’ve also attempted to update the software according to another similar scenario to mine, but it didn’t seem to work. The standby light also flashes twice, but this seem to be consistent to the behavior before the screen stopped working. I checked all the visible capacitors and made sure that none of them have enlarged. I personally think that the led on the back-light might be the problem, but I want to make sure there are any less invasive or expensive method to repair the TV before dismantling it further.

Edit: After furiously hitting all the button I can confirm that the speakers function.