BIOS firmware archive for the Lenovo ThinkPad L420, built on a Quanta motherboard numbered DAGC9EMB8E0, distributed as RAR. Quanta assigns DA-prefixed project numbers, and this one identifies the L420 design. No revision is stated, so check the PCB marking before trusting the image. The dump serves to restore a corrupted SPI flash using an external programmer. ThinkPad chips can store serial and system data, so dump and keep the original first. Confirm the image size matches the chip capacity.
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 →