BIOS image for a Lenovo IdeaPad 5 Pro with board marking NB3029_MB_U_V4, which the name lists as a 16 MB flash. It is supplied as a 6.31 MB RAR, so the extracted image should be 16 MB. Technicians program it with an SPI programmer to recover a board that fails to start after firmware corruption. Check that the board label and the chip capacity match, and save a copy of the original chip, which holds serial and activation data, before writing.
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 →