Duplicate 4.00 MB firmware dump labelled R540 JS05RU, with no brand, board number or BIOS version in the name. Hash both copies to see whether they are identical before choosing one. The size corresponds to a 32 Mbit SPI flash, typical for laptops of that era. Technicians use such images to reflash corrupted chips on boards that fail to start or show no display. Confirm the motherboard marking first, back up the original chip, and check that the capacity of the fitted flash matches the file.
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.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →