Working BIOS for the ASUS K55VD notebook, board revision 3.0, marked fully working. ASUS often makes several revisions of one model, and firmware for one revision may not suit another, so check the REV marking on the PCB. This 11.9 MB archive is noticeably larger than the REV 3.1 upload, so it may hold more than one image. Unpack it, find the image that matches your chip size, and back up the original before writing with a programmer.
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 →