18740-1 – HP 13-AR0xxx
The HP 13-AR0xxx and HP x360 are built on the 18740-1 board designed by Wistron. 3 files are indexed for this board: 3 BIOS files and 1 EC firmware image.
The earliest file dates from February 2022 (BIOS Archive).
BIOS dumps 3
Board facts
| Board number | 18740-1 |
|---|---|
| Designed by | Wistron |
| Platform group | 18XXX |
| First seen | 2022-02-19 |
| Source channels | BIOS Archive |
| About the number | Wistron board numbers look like 15217-1; the first two digits usually indicate the design year. |
Laptops that use 18740-1
- HP 13-AR0xxx
- HP x360
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.
EC (embedded controller) firmware runs the keyboard controller, power sequencing, battery charging and fans. Depending on the board it lives in a separate chip (ENE KB9012, ITE IT85xx, Nuvoton NPCE) or inside the main SPI image, so check which applies before flashing.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .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 18740-1 board?
Files in the catalog link 18740-1 to the HP 13-AR0xxx and HP x360.
Who designed the 18740-1 board?
18740-1 is a Wistron board number used by HP.
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.