Lenovo T490 NM-B901 BIOS
File details
| Type | BIOS |
|---|---|
| Brand | Lenovo |
| Model | T490 |
| Board number | NM-B901 |
| Board maker (ODM) | Compal |
| Revision | 1.0 |
| Device | Laptop |
| Format | RAR |
| Size | 10 MB |
| Added | April 24, 2026 |
| Updated | |
| Original file name | Lenovo T490 , NM-B901 rev.1.0 20N3-SA5500.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.
Description
BIOS dump for the Lenovo T490 laptop, board number NM-B901 revision 1.0, from the Compal design. The archive is a RAR file of about 10.2 MB, filed as "Lenovo T490 , NM-B901 rev.1.0 20N3-SA5500.rar". A dump like this is used to reprogram the SPI flash chip with a programmer after a corrupted BIOS or a failed update. Before flashing, confirm that your board number and revision match NM-B901 rev 1.0, and back up the original chip contents so you can recover if something goes wrong.
For board NM-B901 the catalog also has 2 schematics, 1 boardview file, and 11 BIOS dumps.
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 T490 NM-B901. 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.