LA-C921P – HP 15
The HP 15, HP 15-ac113nx and HP TPN-C125 are built on the LA-C921P board designed by Compal. 9 files are indexed for this board: 8 BIOS files and 1 schematic.
Revisions seen in file names: 1.0. The BIOS dumps are 8 MB images. ODM project names: ASL50 and AAP21. The earliest file dates from December 2017 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 8
Schematics 1
Board facts
| Board number | LA-C921P |
|---|---|
| Designed by | Compal |
| Platform group | LA-C |
| ODM project | ASL50, AAP21 |
| Revisions | 1.0 |
| BIOS chip size | 8 MB |
| First seen | 2017-12-06 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Skema Boardview Laptop |
| About the number | Compal board numbers start with LA- for main boards and LS- for daughter boards. |
Laptops that use LA-C921P
- HP 15
- HP 15-ac113nx
- HP TPN-C125
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 |
|---|---|---|
| .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-C921P board?
Files in the catalog link LA-C921P to the HP 15, HP 15-ac113nx and HP TPN-C125.
Who designed the LA-C921P board?
LA-C921P is a Compal board number used by HP.
Is there a boardview for LA-C921P?
No boardview has been indexed for LA-C921P yet; the schematic is available on this page.
What BIOS chip size does LA-C921P use?
The BIOS images for LA-C921P are 8 MB.
Are these files free?
1 of the posts are marked VIP or paid in their source channel; the others are ordinary posts. ChambersDesignInc.com does not host or sell files.
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.