Firmware dump for a 4525ac, 2 MB in .bin format. The ac suffix is not explained in the name and may mark a variant or a separate read, so treat it with caution. No board number or BIOS version is stated. A 2 MB image corresponds to a 16 Mbit SPI flash chip and is normally written with a USB programmer and a SOIC clip. Before using it on a dead laptop, back up the chip already on the board and check that the board number on the PCB belongs to the same model.
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 @biosfilebins. 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 →