Lenovo NM-B421 BIOS
File details
| Type | BIOS |
|---|---|
| Brand | Lenovo |
| Board number | NM-B421 |
| Board maker (ODM) | Compal |
| Device | Laptop |
| Format | ZIP |
| Size | 4.9 MB |
| Added | November 25, 2021 |
| Updated | |
| Original file name | Lenovo_ThinkPad_R480_NM_B421_1_0_EE480_EE580_original_16_MB_BIOS.zip |
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.
Description
BIOS dump for a Lenovo laptop, board number NM-B421 from Compal, supplied as a 4.9 MB ZIP. The original file name refers to a ThinkPad R480 and a 16 MB original BIOS image. Technicians use a dump like this to reprogram the SPI flash chip with a programmer after a corrupted BIOS or a failed update. Before flashing, confirm that the board number and revision on your motherboard match the file, and read and save the original contents of your own chip first so you have a way back.
The catalog also lists 2 schematics, 3 boardview files, and 8 BIOS dumps for board NM-B421.
Description generated from the catalog data. ·
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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 NM-B421. 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.