Firmware archive for the Lenovo B51-30 notebook on Compal board LA-C291P, with the YJBF token in the name, delivered as a 3.40 MB RAR. Compal uses the LA-xxxxP format for its motherboard numbers, and the same board is shared by more than one Lenovo model, so check the printed number on the PCB first. The dump is meant for restoring a corrupted or locked BIOS chip through an SPI programmer. Read and keep the original firmware before flashing, and make sure the file size matches the capacity of the installed flash 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.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 7 Jul 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 28 Oct 2019 | Open file on RM Schematics |
| @biositechyangiyer | 5 Jun 2020 | Open file on RM Schematics |
| @biosdumpcomputer | 26 May 2022 | 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 →