BIOS image for the HP Compaq Presario CQ40-601TU, archived as a 3.59 MB ZIP. The name gives only the model with no board number or revision, so match the mainboard marking against this model before use, since the CQ40 came on more than one board. Dumps like this are programmed onto the SPI flash with an external programmer to restore corrupted firmware or cure a no-POST fault. Save the existing chip contents first and check that the image length corresponds to the installed flash device.
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 @Laptopdesktopbios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →