LA-E291P – Lenovo ThinkPad 370
The Lenovo ThinkPad 370 and Lenovo Yoga 370 are built on the LA-E291P board designed by Compal. 8 files are indexed for this board: 4 BIOS files, 1 schematic, 3 boardviews and 2 EC firmware images.
File names mention revision 1A, 0.1 or 0.3. ODM project name: CIZS1. The earliest file dates from February 2021 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 4
Schematics 1
Boardviews 3
Board facts
| Board number | LA-E291P |
|---|---|
| Designed by | Compal |
| Platform group | LA-E |
| ODM project | CIZS1 |
| Revisions | 1A, 0.1, 0.3 |
| First seen | 2021-02-16 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, Boardview Schematics |
| About the number | Compal board numbers start with LA- for main boards and LS- for daughter boards. |
Laptops that use LA-E291P
- Lenovo ThinkPad 370
- Lenovo Yoga 370
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 |
| .cad | .cad boardview | FlexBV, OpenBoardView or BoardViewer |
| .fz | ASUS-style .fz boardview | OpenBoardView or FlexBV |
| .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 LA-E291P board?
Files in the catalog link LA-E291P to the Lenovo ThinkPad 370 and Lenovo Yoga 370.
Who designed the LA-E291P board?
LA-E291P is a Compal board number used by Lenovo.
Is there a boardview for LA-E291P?
Yes, 3 boardview files in .bdv, .cad and .fz 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.