BIOS dump labelled HM-STAR-B90, 2.68 MB inside a RAR archive. The name gives no laptop brand or ODM board number, so identify the device by comparing the marking on the motherboard with the label before use. The firmware is normally written to the SPI flash chip with an external programmer such as a CH341A to revive a board with corrupted firmware. Read and keep the original contents first, and make sure the extracted image size matches the chip capacity so it fits.
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 @biosarchive. 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 →