ASUS PU451LD laptop BIOS for mainboard revision 2.0, sized for a 16 MB SPI flash chip and marked OK, suggesting it has been confirmed working. Packed as RAR, the dump can be written with an external programmer to revive a notebook that will not start after a bad update or chip corruption. The PU451LD is an ASUS business model, so check the board revision on the PCB is 2.0 rather than 2.1. Back up the original chip first, since it may hold serial number and license data you will want to restore.
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 →