Firmware dump for the Acer Extensa 4630Z, with the model name spelled extenca in the original label and no file extension attached. The image is 2.00 MB, which corresponds to a 16 Mbit SPI flash chip, so check that the chip on your board has the same capacity. No board number or revision is stated, so confirm the motherboard markings first. With an external programmer, a file like this can bring back a machine that will not post after a corrupted BIOS, but always save the existing chip contents before you write anything.
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 @abgm_manutencao_bios. 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 →