The file may have downloaded incorrectly. Delete the file, clear your browser cache, and download the package again.
If using a USB drive, reboot your system, enter the BIOS/UEFI menu, and locate the built-in firmware flashing utility (e.g., EZ Flash, Q-Flash, or M-Flash). Sp36811.5 Firmware Download
Since firmware for these boards is usually specific to the panel manufacturer (e.g., BOE, LG, Samsung) and resolution, flashing the wrong file can cause a black screen or improper display. A FAT32 formatted USB drive is required. The file may have downloaded incorrectly