Working BIOS for board NB2593 version 1, labelled as fully functional, in an 18.2 MB RAR; no brand or model is given in the name. Identify the target laptop by the NB2593 marking on its PCB before using it. Such a dump is written to the SPI flash with an external programmer to recover boards with corrupted firmware that fail to boot or show no image. Back up the existing chip contents first, and confirm the image size matches the flash chip capacity so the write succeeds.
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 →