HP BIOS image for the Quanta-made board DAG3MMB6AB0, revision B, with the code 08A21 in the name, sized for a 16MB flash chip. DA-prefixed numbers follow Quanta's board numbering, the ODM behind many HP notebooks. Write it with an SPI programmer to recover a board that will not boot due to corrupted firmware. Back up the original chip first, since it holds serial and product data, and confirm both the DAG3MMB6AB0 marking and revision B on the PCB.
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 →