Firmware dump for the HP 15-ac23ur laptop on a Compal LA-C811P board, revision 1.0, packed in a 3.54 MB RAR archive. LA-xxxxP is Compal's motherboard code style, and the same platform is used across several HP 15 and 250 G4 models, so match the board label rather than the model alone. Technicians write images like this to the SPI flash with a programmer when a unit fails to post or shows a black screen after a bad update. Back up the existing chip and check that the image size equals the flash capacity before programming.
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 →