LA-2821P – HP Compaq NX9420
LA-2821P is the Compal main board used in the HP Compaq NX9420 and HP Compaq NW9440. ChambersDesignInc.com has indexed 2 files for this board — 1 BIOS file and 1 schematic.
Revisions seen in file names: 1B. First posted in May 2022 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 1
Schematics 1
Board facts
| Board number | LA-2821P |
|---|---|
| Designed by | Compal |
| Platform group | LA-2 |
| Revisions | 1B |
| First seen | 2022-05-01 |
| 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-2821P
- HP Compaq NX9420
- HP Compaq NW9440
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.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| 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-2821P?
No boardview has been indexed for LA-2821P yet; the schematic is available on this page.
Who designed the LA-2821P board?
LA-2821P is a Compal board number used by HP.
Which laptops use the LA-2821P board?
Files in the catalog link LA-2821P to the HP Compaq NX9420 and HP Compaq NW9440.
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.