Firmware for a VS-T596 TV board, version 1.3, with PTATECHINA in the name, probably the source or a variant label. The file is 1.00 MB and has no extension, so it is most likely a raw dump. A size like this fits a 1 MB (8 Mbit) SPI flash chip, which is written with a programmer to recover a set that will not boot or shows no picture. Check the chip capacity and the board code on the PCB first, and read and keep the original chip contents before writing anything.
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 @hashmielecom. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →