BIOS firmware archive for the Dell Latitude E5250 built on the Compal LA-A891P motherboard, revision 1.0. The name notes that the board uses a single BIOS chip, designated UC2, so the whole image goes onto that one SPI flash. LA-xxxxP numbers follow Compal's numbering, Dell's ODM here. Before writing with a programmer such as a CH341A, read and save the original chip contents, confirm the PCB revision matches, and check that the dump size equals the flash capacity of UC2.
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 @laptop_bios_schematic. Enginerys does not host this file.
All sources (8)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @laptop_bios_schematic | 6 Jun 2021 | Open file on RM Schematics |
| @laptop_bios_schematic | 30 Aug 2021 | Open file on RM Schematics |
| @pepeelectronica | 24 Apr 2022 | Open file on RM Schematics |
| @cidschematicandboardviewofficial | 27 Jan 2025 | Open file on RM Schematics |
| @cidschematicandboardviewofficial | 27 Jan 2025 | Open file on RM Schematics |
| @schematiclaptopramkushwaha | 14 Jul 2025 | Open file on RM Schematics |
| @schematics_bios | 25 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 1 Aug 2026 | 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 →