09939-1 – Lenovo LA36
The Lenovo LA36 and Lenovo V360 are built on the 09939-1 board designed by Wistron. The catalog lists 3 files for it: 2 BIOS files, 1 schematic and 1 EC firmware image.
The BIOS dumps are 4 MB images. The earliest file dates from April 2021 (BIOS Archive, Cyberlan Electronics and Schematics & Boardviews Archive).
BIOS dumps 2
Schematics 1
Board facts
| Board number | 09939-1 |
|---|---|
| Designed by | Wistron |
| Platform group | 09XXX |
| Also known as | 48.4JG01.011 |
| BIOS chip size | 4 MB |
| First seen | 2021-04-24 |
| Source channels | BIOS Archive, Cyberlan Electronics, Schematics & Boardviews Archive |
| About the number | Wistron board numbers look like 15217-1; the first two digits usually indicate the design year. |
Laptops that use 09939-1
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.
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 09939-1 board?
Files in the catalog link 09939-1 to the Lenovo LA36 and Lenovo V360.
Is there a boardview for 09939-1?
No boardview has been indexed for 09939-1 yet; the schematic is available on this page.
Who designed the 09939-1 board?
09939-1 is a Wistron board number used by Lenovo.
What BIOS chip size does 09939-1 use?
The BIOS images for 09939-1 are 4 MB.
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.