12290-1 – Lenovo ThinkPad L540
The Lenovo ThinkPad L540 is built on the 12290-1 board designed by Wistron. The catalog lists 4 files for it: 2 BIOS files, 1 schematic and 1 boardview.
The BIOS dumps are 8 MB images. The earliest file dates from October 2021 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 2
Schematics 1
Boardviews 1
Board facts
| Board number | 12290-1 |
|---|---|
| Designed by | Wistron |
| Platform group | 12XXX |
| Also known as | 48.4LH01.01M |
| BIOS chip size | 8 MB |
| Flash chip | MX25L6473E |
| First seen | 2021-10-18 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, Boardview Schematics |
| About the number | Wistron board numbers look like 15217-1; the first two digits usually indicate the design year. |
Laptops that use 12290-1
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.
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 |
|---|---|---|
| .bin | raw SPI flash image | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
Questions
Who designed the 12290-1 board?
12290-1 is a Wistron board number used by Lenovo.
Is there a boardview for 12290-1?
Yes, 1 boardview file.
Which laptops use the 12290-1 board?
Files in the catalog link 12290-1 to the Lenovo ThinkPad L540.
What BIOS chip size does 12290-1 use?
The BIOS images for 12290-1 are 8 MB. Flash chips named in the files: MX25L6473E.
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.