LA-A091P – Lenovo G505S
The LA-A091P (Compal) motherboard is found in the Lenovo G505S, Lenovo G405S and Lenovo Z505. The catalog lists 7 files for it: 3 BIOS files, 1 schematic, 2 boardviews and 2 EC firmware images.
File names mention revision 1.0 or 1A. First posted in March 2017 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 3
Schematics 1
Boardviews 2
EC / KBC firmware 1
Board facts
| Board number | LA-A091P |
|---|---|
| Designed by | Compal |
| Platform group | LA-A |
| Revisions | 1.0, 1A |
| EC / KBC chip | KB9012P |
| First seen | 2017-03-08 |
| 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-A091P
- Lenovo G505S
- Lenovo G405S
- Lenovo Z505
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 |
| .bin | raw SPI flash image | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
| 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 |
Questions
Is there a boardview for LA-A091P?
Yes, 2 boardview files in .bdv format.
Which laptops use the LA-A091P board?
Files in the catalog link LA-A091P to the Lenovo G505S, Lenovo G405S and Lenovo Z505.
Who designed the LA-A091P board?
LA-A091P 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.