In short: The board number is printed in white silk-screen or on a copper label on the motherboard itself — usually near the RAM slots, under the keyboard side, or along an edge. It looks like LA-E891P (Compal), NM-B452 (LCFC / Lenovo), DA0X8BMB6F0 (Quanta), 6050A2945701 (Inventec) or 820-00165 (Apple). Search for that number, not the laptop model.
Why the model name is not enough
A retail name such as “HP 15-bs” or “IdeaPad 320-15” covers many configurations: Intel and AMD versions, integrated and discrete graphics, sometimes boards from two different factories. Each of those is a separate design with its own schematic. The board number identifies one design exactly.
Where to look
- Around the memory slots. The most common place: lift the RAM and look at the silk-screen beside or under it.
- Under the battery or the bottom cover. Often visible as soon as the cover is off.
- Along the board edge near a corner, next to the revision and a date code.
- On the keyboard side. Some boards are printed only on the top, so the board has to come out.
- Under a black sticker or mylar sheet. Peel a corner back carefully.
Ignore long barcode stickers — those are serial and spare-part numbers. The board number is etched or printed on the PCB.
What each manufacturer’s number looks like
| Pattern | Factory | Example | Brands that use it |
|---|---|---|---|
LA-xxxxP |
Compal | LA-E891P | HP, Dell, Acer, Lenovo, Toshiba |
NM-xxxx |
LCFC | NM-B452 | Lenovo |
DA0xxxMBxxx |
Quanta | DA0X8BMB6F0 | HP, Acer, Dell, Lenovo |
xxxxx-x + project name |
Wistron | 17806-1 | Dell, Lenovo, Acer, HP |
6050Axxxxxxx |
Inventec / Foxconn | 6050A2945701 | HP, Toshiba |
60NBxxxx-MBxxxx |
ASUS / Pegatron | 60NB0QJ0-MB5101 | ASUS |
MS-xxxxx |
MSI | MS-16J91 | MSI |
820-xxxxx |
Apple | 820-00165 | MacBook, iMac |
BA41-xxxxxA |
Samsung | BA41-02206A | Samsung |
6-71-xxxxx |
Clevo | 6-71-N85H0-D02 | Clevo, Sager and rebrands |
More detail is in board number prefixes by manufacturer.
Note the revision too
Next to the number you will usually find REV: 1.0, Rev A00 or a letter suffix. Revisions can move or rename components, so when two files exist, pick the one that matches yours. If only another revision is available it is still useful — the circuit is normally the same — but double-check part names.
Then search
Type the number into the search box exactly as printed. Enginerys also understands it without the dash (LAE891P) and shows a single board page that gathers every schematic, boardview and BIOS dump seen for it.
Desktop boards and phones
Desktop motherboards carry the model name and a PCB revision (REV 1.03) between the expansion slots. Phones are identified by the model code on the back cover or in the SIM tray — for example SM-A515F — and by the board marking under the shields.