BM5899
The BM5899 board comes from Bitland. ChambersDesignInc.com has indexed 3 files for this board — 2 BIOS files, 1 schematic and 1 boardview.
File names mention revision 1.3. BIOS images are 16 MB. First posted in September 2022 in BIOS Archive and Schematics & Boardviews Archive.
BIOS dumps 2
Schematics 1
Board facts
| Board number | BM5899 |
|---|---|
| Designed by | Bitland |
| Revisions | 1.3 |
| BIOS chip size | 16 MB |
| First seen | 2022-09-28 |
| 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.
A boardview is the component placement map of the PCB: click a part or a net and the viewer highlights where it is and what it connects to. Used together with the schematic to find test points.
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 |
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
Questions
Is there a boardview for BM5899?
Yes, 1 boardview file.
What BIOS chip size does BM5899 use?
The BIOS images for BM5899 are 16 MB.
Who designed the BM5899 board?
BM5899 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.