LA-B921P – Lenovo ThinkPad E41 25
The LA-B921P (Compal) motherboard is found in the Lenovo ThinkPad E41 25 and Lenovo Yoga 311. 3 files are indexed for this board: 1 BIOS file and 2 schematics.
Revisions seen in file names: 1.0. ODM project name: AIZY0. The earliest file dates from January 2022 (Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive).
BIOS dumps 1
Schematics 2
From the uploader
LENOVO E41-25 LA-F971P AIZY0 LA-B921P REV1.0 R10 2014-09-30 PDF
Board facts
| Board number | LA-B921P |
|---|---|
| Designed by | Compal |
| Platform group | LA-B |
| ODM project | AIZY0 |
| Revisions | 1.0 |
| First seen | 2022-01-27 |
| Source channels | Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Archive |
| About the number | Compal board numbers start with LA- for main boards and LS- for daughter boards. |
Laptops that use LA-B921P
- Lenovo ThinkPad E41 25
- Lenovo Yoga 311
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.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| 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
Which laptops use the LA-B921P board?
Files in the catalog link LA-B921P to the Lenovo ThinkPad E41 25 and Lenovo Yoga 311.
Is there a boardview for LA-B921P?
No boardview has been indexed for LA-B921P yet; the schematic is available on this page.
Who designed the LA-B921P board?
LA-B921P is a Compal board number used by Lenovo.
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.