Lenovo BIOS archive for the board NM-E591 revision 1.0, with JS47B and JS47C codes in the name and a stated 32 MB image size, packed into a 15.9 MB RAR. NM- numbers follow LCFC, the Lenovo-owned ODM, and the JS codes are its project identifiers. A 32 MB image fits a 256 Mbit SPI chip, so confirm your flash part before writing. Technicians use it to recover dead or looping boards with an external programmer, after reading and backing up whatever the original chip holds.
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 →