LA-A491P – Dell Latitude 3540
The Dell Latitude 3540 and Dell L3540 are built on the LA-A491P board designed by Compal. ChambersDesignInc.com has indexed 7 files for this board — 3 BIOS files, 2 schematics, 1 boardview and 2 EC firmware images.
Revisions seen in file names: 1.0 and 0.3. ODM project name: ZAL00. The earliest file dates from December 2017 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 3
Schematics 2
Boardviews 1
EC / KBC firmware 1
Board facts
| Board number | LA-A491P |
|---|---|
| Designed by | Compal |
| Platform group | LA-A |
| ODM project | ZAL00 |
| Revisions | 1.0, 0.3 |
| EC / KBC chip | KB9012, KB9012P |
| First seen | 2017-12-16 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics |
| About the number | Compal board numbers start with LA- for main boards and LS- for daughter boards. |
Laptops that use LA-A491P
- Dell Latitude 3540
- Dell L3540
What these files are for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
A schematic is the circuit diagram of the main board: power rails, power-up sequence, component values and net names. It is the reference for measuring voltages and tracing a fault.
A boardview is the component placement map of the PCB: click a part or a net and the viewer highlights where it is and what it connects to. Used together with the schematic to find test points.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .bdv | Honhan .bdv boardview | OpenBoardView, FlexBV or Honhan BoardViewer |
| .cad | .cad boardview | FlexBV, OpenBoardView or BoardViewer |
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Is there a boardview for LA-A491P?
Yes, 1 boardview file in .bdv and .cad format.
Who designed the LA-A491P board?
LA-A491P is a Compal board number used by Dell.
Which laptops use the LA-A491P board?
Files in the catalog link LA-A491P to the Dell Latitude 3540 and Dell L3540.
Where do the download links go?
Each button opens the original public Telegram post the file was shared in. ChambersDesignInc.com only indexes and cross-references those posts.