BIOS firmware package for the Dell Vostro 3558 built on the Compal LA-B843P motherboard, with the ALL10 project code included in the name. The 4.45 MB RAR archive holds the dump a technician writes to the SPI flash chip with a programmer such as a CH341A when the laptop shows no POST or a corrupted BIOS. LA-xxxxP is Compal's numbering pattern, and the same board appears under several Dell models. Confirm the number printed on the PCB and save a backup of the original chip before writing.
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 →