13251-1 – Lenovo ThinkPad T550
The 13251-1 (Wistron) motherboard is found in the Lenovo ThinkPad T550 and Lenovo ThinkPad W550S. The catalog lists 5 files for it: 1 BIOS file, 2 schematics and 2 boardviews.
First posted in June 2021 in Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive.
BIOS dumps 1
Schematics 2
Boardviews 2
Board facts
| Board number | 13251-1 |
|---|---|
| Designed by | Wistron |
| Platform group | 13XXX |
| First seen | 2021-06-12 |
| Source channels | Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Archive |
| About the number | Wistron board numbers look like 15217-1; the first two digits usually indicate the design year. |
Laptops that use 13251-1
- Lenovo ThinkPad T550
- Lenovo ThinkPad W550S
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 |
|---|---|---|
| .gr | .gr boardview | FlexBV or OpenBoardView |
| 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 |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Which laptops use the 13251-1 board?
Files in the catalog link 13251-1 to the Lenovo ThinkPad T550 and Lenovo ThinkPad W550S.
Who designed the 13251-1 board?
13251-1 is a Wistron board number used by Lenovo.
Is there a boardview for 13251-1?
Yes, 2 boardview files in .gr format.
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.