Lenovo ThinkPad T490S FX390 NM-B891 BIOS (REV 2.0, 32 MB)
File details
| Type | BIOS |
|---|---|
| Brand | Lenovo |
| Model | ThinkPad T490S |
| Board number | NM-B891 |
| Platform | FX390 |
| Board maker (ODM) | Compal |
| Revision | 2.0 |
| Device | Laptop |
| Format | ZIP |
| Size | 16 MB |
| BIOS chip size | 32 MB |
| Added | January 17, 2022 |
| Updated | |
| Original file name | ThinkPad_T490S_X390_FX390_NM_B891_Rev2_0_MX25L25633F_32MB_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 the Lenovo ThinkPad T490S laptop, board number NM-B891, revision 2.0, platform FX390 and built by Compal. The file is listed for a 32 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. Before flashing, confirm that the board number and revision match your machine, and save the original chip contents as a backup first. The archive is a ZIP of about 16.2 MB.
The catalog also lists 1 schematic, 1 boardview file, and 11 BIOS dumps for board NM-B891.
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 ThinkPad T490S FX390 NM-B891. 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.