HP 250 G4 firmware package containing both BIOS and EC (embedded controller) images for Compal board LA-C811P, with ABQ52 also in the name, likely the Compal project code. The RAR archive is 16.2 MB. Compal marks its boards with LA- numbers, so verify the code on the PCB first. The BIOS image goes onto the SPI flash chip, while the EC firmware handles power sequencing, keyboard and charging, so a faulty EC image can stop the laptop from turning on. Back up both chips before programming and check that the image sizes fit.
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.
All sources (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 17 Oct 2018 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 29 Oct 2019 | Open file on RM Schematics |
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 →