BIOS firmware labelled for Positivo and BGH G870, in a 2.64 MB RAR archive. The name gives only the model, without board number or version, so identify the mainboard markings before use. These brands sold rebadged laptops from common ODM designs, which is why one image may be associated with both. The dump is meant for rewriting the SPI flash with an external programmer during no-boot repairs. Save the original chip first and ensure the image size matches the chip.
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 @biosarchive. 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 →