LA-H281P – Dell Precision 7740
The Dell Precision 7740 is built on the LA-H281P board designed by Compal. ChambersDesignInc.com has indexed 4 files for this board — 2 BIOS files, 1 schematic and 1 boardview.
Revisions seen in file names: 1.0. First posted in July 2021 in Schematics & Boardviews Archive, BIOS Archive and BIOS Files.
BIOS dumps 2
Schematics 1
Boardviews 1
Board facts
| Board number | LA-H281P |
|---|---|
| Designed by | Compal |
| Platform group | LA-H |
| Revisions | 1.0 |
| First seen | 2021-07-19 |
| Source channels | Schematics & Boardviews Archive, BIOS Archive, BIOS Files, Cyberlan Electronics |
| About the number | Compal board numbers start with LA- for main boards and LS- for daughter boards. |
Laptops that use LA-H281P
- Dell Precision 7740
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 |
|---|---|---|
| .7z | 7-Zip archive | 7-Zip or WinRAR |
| .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
Who designed the LA-H281P board?
LA-H281P is a Compal board number used by Dell.
Which laptops use the LA-H281P board?
Files in the catalog link LA-H281P to the Dell Precision 7740.
Is there a boardview for LA-H281P?
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.