BIOS archive described as for the T420, with NZ3 SWG and REV G in the name, packed as a 4.98 MB RAR. NZ3 and SWG are typically seen on ThinkPad T420 boards, while REV G likely marks the board revision, though the name does not state the brand explicitly. The dump is written to the SPI flash with an external programmer to recover a corrupted BIOS. Compare the markings on your PCB, read and keep the original chip contents, which hold the machine serial data, and confirm the file fits the chip size.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
All sources (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 13 Oct 2018 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 28 Oct 2019 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →