Firmware dump for the Lenovo G450, 2.00 MB, supplied without a file extension and with no board number in the name. The content is most likely a raw binary that a programmer can open directly. The size matches a 16 Mbit SPI flash. Check that your board is a G450 and compare the chip capacity before writing, since variants may differ. Always read the existing chip and keep that copy, then program and verify this image with a tool such as a CH341A or RT809H.
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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →