TCL TV is completely unresponsive

Hey all, my TV stopped responding last night, wondering if you have any tips to get it working?

It's a 2016 TCL, model no. 48FS3750. The light in the bezel turns on and stays on when it's plugged in, so I know it's getting power. But the screen stays black and it's completely unresponsive. The light doesn't flash or dim like it's supposed to when I push buttons on the remote, likewise there's no response from the TV when I push the power button on the back or any of the directional buttons. No luck with the reset button either.

TCL support said they won't do anything since the TV is out of warranty, local repair guy on the phone laughed and said it's time to buy a new TV.

Thanks in advance if you can help, if not guess I'll be spending money :(