Software image for the T56U11 universal TV board, version or variant 21, configured for a 1280x1024 panel according to the name. Additional tokens AU17 and EN05 probably denote panel or customer settings, and Nasir looks like a builder tag. The RAR archive is 2.79 MB, typical of a single SPI flash dump. Universal boards are flashed either by USB or with an external programmer such as a CH341A. Confirm that the panel resolution and LVDS settings suit your screen, and read and save the old firmware before writing.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @bios_bin_file. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →