Compressed archive with BIOS firmware for the Acer Aspire 4738ZG, tagged ZQ9, which is probably the board code. A companion raw 4 MB dump with the same name exists, so this archive likely holds the same or related image. Unpack it and confirm the file size against your SPI flash chip before programming with a CH341A or similar tool. Compare the motherboard markings and keep a copy of the original chip contents before overwriting, in case you need to restore them.
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 @ComputerBIOSBinFile. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →