BIOS archive for the Acer 5620Z labelled version 1.35, very close in size to another package of the same name, so the two may differ only in packing or included files. No motherboard number appears, meaning the board must be identified from its silkscreen. Technicians use such firmware to recover laptops with a damaged BIOS, writing the image with a programmer. Extract it with 7-Zip, compare its length against the chip capacity and keep a backup of the existing firmware before any write operation.
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 @biosfiles. Enginerys does not host this file.
How to open a .7z file
High-ratio compressed archive, often used for large BIOS collections.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →