BM5866
BM5866 is a Bitland Lenovo main board number. ChambersDesignInc.com has indexed 5 files for this board — 4 BIOS files and 1 schematic.
Revisions seen in file names: 1.3. The BIOS dumps are 16 MB images. The earliest file dates from July 2021 (BIOS Archive and Schematics & Boardviews Archive).
BIOS dumps 4
Schematics 1
Board facts
| Board number | BM5866 |
|---|---|
| Designed by | Bitland |
| Revisions | 1.3 |
| BIOS chip size | 16 MB |
| Flash chip | W25Q128FW1 |
| First seen | 2021-07-07 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive |
| About the number | Bitland boards for Lenovo IdeaPad models are named BM followed by four digits. |
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 |
|---|---|---|
| .bin | raw SPI flash image | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
Questions
What BIOS chip size does BM5866 use?
The BIOS images for BM5866 are 16 MB. Flash chips named in the files: W25Q128FW1.
Is there a boardview for BM5866?
No boardview has been indexed for BM5866 yet; the schematic is available on this page.
Who designed the BM5866 board?
BM5866 is a Bitland board number used by Lenovo.
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.