Patched, unlocked BIOS for the Lenovo ThinkPad T550, described in the name as fully working, contained in a 6.07 MB RAR archive. Such a patched image is normally used to remove a supervisor password or similar lock by flashing the SPI chip directly with a programmer and clip. Read and save the original contents before writing, since they carry serial and system data, and confirm the file size fits your flash chip. The name lists no board number, so verify compatibility with your motherboard.
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 →