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Lenovo Yoga CYG50 NM-A901 BIOS

BIOS NM-A901 Added: Dec 2, 2021 RAR · 4.4 MB

File details

TypeBIOS
BrandLenovo
ModelYoga CYG50
Board numberNM-A901
Board maker (ODM)Compal
Revision1.0
DeviceLaptop
FormatRAR
Size4.4 MB
BIOS chip size8 MB
AddedDecember 2, 2021
Updated
Original file nameLENOVO_YOGA_CYG50_NM_A901_AGERA_SVT_REV_1_0_2016_07_01_U7_U6_25Q64FV10.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

No other copies are known yet.

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 Lenovo Yoga CYG50 laptop, board NM-A901 from Compal, revision 1.0, supplied for an 8 MB flash chip. Technicians use a dump like this to reprogram the SPI chip with a programmer after a corrupted BIOS or a failed update. The original file name also references a 25Q64FV10 chip, so compare the marking on your own flash part before writing anything. Confirm that the board number and revision match your laptop, and save the original chip contents first so you can roll back if needed.

The catalog also lists 1 schematic, 1 boardview file, and 3 BIOS dumps for board NM-A901.

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: Lenovo Yoga CYG50 NM-A901. 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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