LA-4991P – Toshiba Satellite A500
The LA-4991P (Compal) motherboard is found in the Toshiba Satellite A500 and Toshiba Satellite A500-025. The catalog lists 4 files for it: 2 BIOS files and 2 schematics.
File names mention revision 0.2 or 1.0. The earliest file dates from May 2018 (Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive).
BIOS dumps 2
Schematics 2
Board facts
| Board number | LA-4991P |
|---|---|
| Designed by | Compal |
| Platform group | LA-4 |
| Revisions | 0.2, 1.0 |
| First seen | 2018-05-28 |
| Source channels | Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Archive, Laptop & Desktop BIOS Files |
| About the number | Compal board numbers start with LA- for main boards and LS- for daughter boards. |
Laptops that use LA-4991P
- Toshiba Satellite A500
- Toshiba Satellite A500-025
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 |
| .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-4991P board?
Files in the catalog link LA-4991P to the Toshiba Satellite A500 and Toshiba Satellite A500-025.
Is there a boardview for LA-4991P?
No boardview has been indexed for LA-4991P yet; the schematic is available on this page.
Who designed the LA-4991P board?
LA-4991P is a Compal board number used by Toshiba.
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.