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Sony M850 MBX-204 BIOS

BIOS MBX-204 Added: May 26, 2022 RAR · 2.6 MB

File details

TypeBIOS
BrandSony
ModelM850
Board numberMBX-204
DeviceLaptop
FormatRAR
Size2.6 MB
Markstested by uploader
AddedMay 26, 2022
Updated
Original file nameSONY M850 MBX-204 WORKING BIOS.rar

Where to get the file

Opens the matching file on RM Schematics, or its source details if it is not catalogued there yet.

Alternative links

AwesomeHeader does not store this file. It was published in a public Telegram channel; the links above lead to the original post and its copies.

Description

BIOS dump for the Sony M850 laptop, board number MBX-204, supplied as a 2.6 MB RAR archive named SONY M850 MBX-204 WORKING BIOS.rar. The uploader marked it as tested, though that is their own claim and has not been independently verified. Technicians use a BIOS dump like this to reprogram the SPI flash chip with a programmer after a corrupted BIOS or a failed update.

The catalog also lists 1 schematic and 4 BIOS dumps for board MBX-204.

Description generated from the catalog data. ·

How to open it

A BIOS dump is written to the SPI flash chip with a programmer such as the CH341A and a SOIC8 clip. Read and save the original chip contents twice before writing.

Guide: Flash a Laptop BIOS with a CH341A Programmer →

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Questions about this file

How do I flash this BIOS dump?

Write it to the SPI flash chip with a programmer such as the CH341A and a SOIC8 clip. Read and keep the original contents first, and check that the chip size matches the dump.

Will this BIOS work on my board?

Only if the board number and revision match: Sony M850 MBX-204. Dumps from a different board or revision can leave the board dead.

What does “clean ME” mean?

The Intel ME region in the dump has been reset, so it can be used on another board of the same model. Keep your original dump and transfer serial numbers if needed.

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