Embedded controller firmware, 128 KB according to the name, for a board numbered LA-D121P, delivered as a 55.5 KB ZIP. LA- numbers follow the Compal pattern, and the brand of the laptop itself is not given, so verify the code on your PCB. EC firmware controls power-on, charging, keyboard and fan behaviour, so a corrupted EC image can leave a board dead or failing to charge. Write it to the EC or its dedicated flash with a suitable programmer, backing up the original contents first and checking the size matches the target.
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 @efibios. Enginerys does not host this file.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @efibios | 5 Oct 2020 | Open file on RM Schematics |
| @pepeelectronica | 26 Apr 2022 | Open file on RM Schematics |
| @schematics_bios | 25 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 2 Aug 2026 | Open file on RM Schematics |
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →