LA-3491P – HP 520
The HP 520 is built on the LA-3491P board designed by Compal. ChambersDesignInc.com has indexed 4 files for this board — 1 BIOS file and 3 schematics.
Revisions seen in file names: 0.1, 0.5 and 1.0. ODM project name: IAT50. The earliest file dates from December 2017 (Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive).
BIOS dumps 1
Schematics 3
Board facts
| Board number | LA-3491P |
|---|---|
| Designed by | Compal |
| Platform group | LA-3 |
| ODM project | IAT50 |
| Revisions | 0.1, 0.5, 1.0 |
| First seen | 2017-12-14 |
| 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-3491P
- HP 520
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-3491P board?
Files in the catalog link LA-3491P to the HP 520.
Who designed the LA-3491P board?
LA-3491P is a Compal board number used by HP.
Is there a boardview for LA-3491P?
No boardview has been indexed for LA-3491P yet; the schematic is available on this page.
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.