LA-J643P – HP 15
The LA-J643P (Compal) motherboard is found in the HP 15. The catalog lists 7 files for it: 2 BIOS files, 2 schematics and 3 boardviews.
Revisions seen in file names: 1.0. BIOS images are 16 MB. ODM project names: GPC52 and GPC50. The earliest file dates from July 2022 (Schematics & Boardviews Archive, BIOS Archive and Cyberlan Electronics).
BIOS dumps 2
Schematics 2
Boardviews 3
Board facts
| Board number | LA-J643P |
|---|---|
| Designed by | Compal |
| Platform group | LA-J |
| ODM project | GPC52, GPC50 |
| Revisions | 1.0 |
| BIOS chip size | 16 MB |
| Flash chip | W25Q128JV |
| First seen | 2022-07-06 |
| Source channels | Schematics & Boardviews Archive, BIOS Archive, Cyberlan Electronics |
| About the number | Compal board numbers start with LA- for main boards and LS- for daughter boards. |
Laptops that use LA-J643P
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
Which laptops use the LA-J643P board?
Files in the catalog link LA-J643P to the HP 15.
Is there a boardview for LA-J643P?
Yes, 3 boardview files in .bdv and .cad format.
Who designed the LA-J643P board?
LA-J643P is a Compal board number used by HP.
What BIOS chip size does LA-J643P use?
The BIOS images for LA-J643P are 16 MB. Flash chips named in the files: W25Q128JV.
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.