LA-B091P – Lenovo B50
The LA-B091P (Compal) motherboard is found in the Lenovo B50, Lenovo B50-70, Lenovo 70 and Lenovo 80. The catalog lists 24 files for it: 19 BIOS files, 2 schematics, 2 boardviews and 3 EC firmware images.
File names mention revision 1.0, 2.0 or 3.0. ODM project names: ZIWB3, ZIWE1, ZIWB2 and ZWIB3. First posted in February 2017 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 19
Schematics 2
Boardviews 2
EC / KBC firmware 1
From the uploader
LENOVO B50-70 B40-70 ZIW2B ZIWB3 ZIWE1 LA-B091P REV 2.0 2014-09-12
LENOVO B50-70 B40-70 ZIW2B ZIWB3 ZIWE1 LA-B091P REV 2.0 2014-09-12 i5-5200U
Board facts
| Board number | LA-B091P |
|---|---|
| Designed by | Compal |
| Platform group | LA-B |
| ODM project | ZIWB3, ZIWE1, ZIWB2, ZWIB3 |
| Revisions | 1.0, 2.0, 3.0 |
| EC / KBC chip | KB9012 |
| CPU generation | Intel 5th gen |
| Graphics | discrete GPU |
| First seen | 2017-02-20 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Skema Boardview Laptop |
| About the number | Compal board numbers start with LA- for main boards and LS- for daughter boards. |
Laptops that use LA-B091P
- Lenovo B50
- Lenovo B50-70
- Lenovo 70
- Lenovo 80
- Lenovo B40
- Lenovo IdeaPad 305-15IBD
- Lenovo B40-70
- Lenovo B50-80
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 |
|---|---|---|
| .7z | 7-Zip archive | 7-Zip or WinRAR |
| .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 |
| .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-B091P board?
Files in the catalog link LA-B091P to the Lenovo B50, Lenovo B50-70, Lenovo 70, Lenovo 80, Lenovo B40, Lenovo IdeaPad 305-15IBD, Lenovo B40-70 and Lenovo B50-80.
Is there a boardview for LA-B091P?
Yes, 2 boardview files in .bdv format.
Who designed the LA-B091P board?
LA-B091P 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.