Downloading firmware for the board with a 1366x768 resolution, specifically the "Saudi Arab Ref53" variant, typically involves sourcing the files from technician communities or specialized software repositories. Because these files are often split into multiple RAR parts (such as the part4.rar you mentioned), you must download all parts and place them in the same folder before extracting them to avoid errors. Where to Find the Download

: Many technicians share direct Google Drive or Mediafire links in the descriptions of repair videos. For instance, Smart Service and Telugu Electronics provide guides on downloading and installing this firmware via USB.

: Format a USB flash drive (8GB or 16GB) to FAT32 .

Release the button once the indicator light starts blinking, showing the update is in progress.

Technical resources for this specific universal Android board are frequently shared on the following platforms:

: Copy the firmware file (usually named allinstall.bin or similar) to the root directory of your USB drive. Flashing : Power off the TV. Insert the USB drive into the TV's USB port.