Firmware archive for an E15S main board revision 2.1, a 4.18 MB RAR with no brand stated in the file name. Because the manufacturer and chip are unknown from the name, compare model and revision markings on the PCB before using it. Such packages normally contain the BIOS image for reprogramming the SPI flash when a board does not POST or shows no display after a failed update. Read and keep the current chip contents with a programmer first, then check that the image size matches the flash chip capacity.
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 →