Firmware file for the HP Compaq Presario CQ42-355TU, supplied as a very small 55 KB ZIP. That size is far below a full SPI flash image, so it may hold an EC or partial BIOS dump rather than a complete chip image; inspect the contents before writing anything. No board number appears in the name, so confirm the mainboard code on the PCB. When flashing with a programmer, save the original chip first and make sure any image you write matches the capacity of the target chip.
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 →