H0226-2 – Lenovo ThinkPad T420S
The Lenovo ThinkPad T420S is built on the H0226-2 board designed by Wistron. The catalog lists 3 files for it: 1 BIOS file, 1 schematic and 1 boardview.
First posted in July 2023 in Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive.
BIOS dumps 1
Schematics 1
Boardviews 1
Board facts
| Board number | H0226-2 |
|---|---|
| Designed by | Wistron |
| First seen | 2023-07-31 |
| 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 H0226-2
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 |
|---|---|---|
| .bdv | Honhan .bdv boardview | OpenBoardView, FlexBV or Honhan BoardViewer |
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .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
Is there a boardview for H0226-2?
Yes, 1 boardview file in .bdv format.
Who designed the H0226-2 board?
H0226-2 is a Wistron board number used by Lenovo.
Which laptops use the H0226-2 board?
Files in the catalog link H0226-2 to the Lenovo ThinkPad T420S.
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.