LA-J191P – Dell Precision 5550
LA-J191P is the Compal main board used in the Dell Precision 5550 and Dell XPS 13 7390. The catalog lists 6 files for it: 5 BIOS files and 1 schematic.
Revisions seen in file names: 1.0 and 2.0. The BIOS dumps are 32 MB images. ODM project names: FDC55 and FDQ50. The earliest file dates from November 2022 (BIOS Archive and Schematics & Boardviews Archive).
BIOS dumps 5
Schematics 1
Board facts
| Board number | LA-J191P |
|---|---|
| Designed by | Compal |
| Platform group | LA-J |
| ODM project | FDC55, FDQ50 |
| Revisions | 1.0, 2.0 |
| BIOS chip size | 32 MB |
| CPU generation | Intel 10th gen |
| First seen | 2022-11-16 |
| 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-J191P
- Dell Precision 5550
- Dell XPS 13 7390
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-J191P board?
Files in the catalog link LA-J191P to the Dell Precision 5550 and Dell XPS 13 7390.
What BIOS chip size does LA-J191P use?
The BIOS images for LA-J191P are 32 MB.
Are these files free?
1 of the posts are marked VIP or paid in their source channel; the others are ordinary posts. ChambersDesignInc.com does not host or sell files.
Who designed the LA-J191P board?
LA-J191P is a Compal board number used by Dell.
Is there a boardview for LA-J191P?
No boardview has been indexed for LA-J191P 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.