BIOS archive for the HP Pavilion DV6640er, with Quanta AT referring to the board family made by the ODM Quanta. No full board number or revision is given, so confirm the PCB marking before use. The RAR of about 526 KB likely contains a small flash image typical of laptops from that generation. Use it to restore corrupted firmware with an SPI programmer. Read and store the original chip first, and 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 →