BIOS dump for an LCFC board NM-B421 revision 1, reported as tested by FST Fix, with no laptop model given in the name. The NM- prefix is the LCFC numbering used on Lenovo boards, so the model must be confirmed from the PCB or service tag. The 4.70 MB RAR serves SPI flash recovery with an external programmer on a board stuck without display or POST. Check that the board number and revision match exactly, keep a read of the original chip before writing, and confirm that the image length fits the chip.
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 @generalbios. 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 →