BM5860 – Lenovo 300E
The Lenovo 300E and Lenovo Chromebook 100E are built on the BM5860 board designed by Bitland. ChambersDesignInc.com has indexed 3 files for this board — 2 BIOS files, 1 schematic and 1 EC firmware image.
The earliest file dates from April 2022 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 2
Schematics 1
Board facts
| Board number | BM5860 |
|---|---|
| Designed by | Bitland |
| CPU generation | Intel 2nd gen |
| First seen | 2022-04-14 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics |
| About the number | Bitland boards for Lenovo IdeaPad models are named BM followed by four digits. |
Laptops that use BM5860
- Lenovo 300E
- Lenovo Chromebook 100E
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 |
|---|---|---|
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the BM5860 board?
BM5860 is a Bitland board number used by Lenovo.
Which laptops use the BM5860 board?
Files in the catalog link BM5860 to the Lenovo 300E and Lenovo Chromebook 100E.
Is there a boardview for BM5860?
No boardview has been indexed for BM5860 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.