LA-9931P – Dell Latitude E6440
The LA-9931P (Compal) motherboard is found in the Dell Latitude E6440. The catalog lists 10 files for it: 5 BIOS files, 3 schematics, 1 boardview and 2 EC firmware images.
Revisions seen in file names: 1.0. ODM project name: VAL90. The earliest file dates from April 2020 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 5
Schematics 3
Boardviews 1
EC / KBC firmware 1
From the uploader
DELL LATITUDE E6440 VAL90 LA-9931P REV 1.0(A00) 2014-04-14 i7-4600M MEC5075 KB9012A4
Board facts
| Board number | LA-9931P |
|---|---|
| Designed by | Compal |
| Platform group | LA-9 |
| ODM project | VAL90 |
| Revisions | 1.0 |
| EC / KBC chip | KB9012 |
| CPU generation | Intel 4th gen |
| First seen | 2020-04-18 |
| 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-9931P
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 |
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Which laptops use the LA-9931P board?
Files in the catalog link LA-9931P to the Dell Latitude E6440.
Who designed the LA-9931P board?
LA-9931P is a Compal board number used by Dell.
Is there a boardview for LA-9931P?
Yes, 1 boardview file in .bdv and .cad format.
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.