BIOS dump identified only as ASUS K53M, with no board revision, version or extension given in the name. Its 4 MB size fits a 32 Mbit serial flash chip, so it can be written directly with an external programmer such as a CH341A, TL866 or RT809 using a test clip or after desoldering. Before flashing, read the original chip twice and compare the reads to make sure they match. Also confirm the motherboard revision printed on the PCB, because ASUS often fitted different boards under one model name.
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 @biosfilebins. 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 →