Main BIOS image for a CQ45-702TU, a Compaq Presario CQ45 model code, with main separating it from any EC firmware. No board number is stated. The 4 MB file matches a 32 Mbit SPI flash chip, typically an SOIC-8 device readable with a test clip. Before programming, check the mainboard number on the PCB and the chip marking to confirm capacity. Save the original contents first, since recovery is easier with a backup, then write and verify the image.
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 @bios_laptop. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →