MBX-204 – Sony M850
The MBX-204 (Foxconn) motherboard is found in the Sony M850, Sony M851 and Sony PCG-7171T. ChambersDesignInc.com has indexed 6 files for this board — 5 BIOS files and 1 schematic.
Revisions seen in file names: 1.0. BIOS images are 2 MB. The earliest file dates from November 2017 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 5
Schematics 1
Board facts
| Board number | MBX-204 |
|---|---|
| Designed by | Foxconn |
| Also known as | MBX-217 |
| Revisions | 1.0 |
| BIOS chip size | 2 MB |
| First seen | 2017-11-08 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Skema Boardview Laptop |
| About the number | Sony VAIO main boards are named MBX-xxx; the same board also has an ODM (Quanta, Foxconn, Wistron, Compal) number. |
Laptops that use MBX-204
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 MBX-204 use?
The BIOS images for MBX-204 are 2 MB.
Who designed the MBX-204 board?
MBX-204 is a Foxconn board number used by Sony.
Is there a boardview for MBX-204?
No boardview has been indexed for MBX-204 yet; the schematic is available on this page.
Which laptops use the MBX-204 board?
Files in the catalog link MBX-204 to the Sony M850, Sony M851 and Sony PCG-7171T.
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.