LA-8392P – Toshiba Satellite P855-S5312
The LA-8392P (Compal) motherboard is found in the Toshiba Satellite P855-S5312. The catalog lists 5 files for it: 3 BIOS files, 1 schematic and 2 EC firmware images.
File names mention revision 1.0. BIOS images are 2 MB and 4 MB. First posted in April 2019 in BIOS Archive and Schematics & Boardviews Archive.
BIOS dumps 3
Schematics 1
EC / KBC firmware 1
Board facts
| Board number | LA-8392P |
|---|---|
| Designed by | Compal |
| Platform group | LA-8 |
| Revisions | 1.0 |
| BIOS chip size | 2 MB, 4 MB |
| First seen | 2019-04-04 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive |
| About the number | Compal board numbers start with LA- for main boards and LS- for daughter boards. |
Laptops that use LA-8392P
- Toshiba Satellite P855-S5312
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.
EC (embedded controller) firmware runs the keyboard controller, power sequencing, battery charging and fans. Depending on the board it lives in a separate chip (ENE KB9012, ITE IT85xx, Nuvoton NPCE) or inside the main SPI image, so check which applies before flashing.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .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
Who designed the LA-8392P board?
LA-8392P is a Compal board number used by Toshiba.
Is there a boardview for LA-8392P?
No boardview has been indexed for LA-8392P yet; the schematic is available on this page.
Which laptops use the LA-8392P board?
Files in the catalog link LA-8392P to the Toshiba Satellite P855-S5312.
What BIOS chip size does LA-8392P use?
The BIOS images for LA-8392P are 2 MB and 4 MB.
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.