If the TV turns on but the remote fails, you may have installed firmware for a different brand's board. You can sometimes fix this by using a Universal Remote or entering the Service Menu (usually Menu + 1147 or Source + 2580 ) to change the remote code.

Technician communities are the most reliable source for these .rar files. Look for your specific model on these sites:

Finding the exact firmware for the can be difficult as official downloads are often restricted to service centers. However, you can often find these files on specialized technician forums or by using universal methods.

the power button on the TV (not the remote) and plug the power cord back in.