Format a USB flash drive to FAT32 to ensure the TV can read the file system.
Often uses Realtek solutions like the RTD2831 or similar multi-core processors.
Download and extract the .rar or .zip file. You should see a file with a .bin or .img extension.
Updating the firmware is a common fix for bootloader errors, "hanging" at the logo, or mirror display issues.
For severe "bricks," technicians often use an RT809H programmer to re-flash the EMMC memory directly.