Archive for the Lenovo ThinkPad T420 marked NZ3 and UMA, meaning the integrated-graphics variant without a discrete GPU; NZ3 is the board code used for this model family. The 1.61 MB RAR file content is not specified by the name, so open it to see whether it holds a firmware dump, schematic or boardview. Discrete and UMA T420 boards differ, so confirm which version you have before relying on the data. Any BIOS image should be flashed only after a full backup of the original SPI chip.
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 @schematicslaptop. Enginerys does not host this file.
All sources (12)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 17 Sept 2019 | Open file on RM Schematics |
| @laptexdna | 30 Jun 2020 | Open file on RM Schematics |
| @LaptopsBoardview | 3 Nov 2020 | Open file on RM Schematics |
| @one5technology | 25 Nov 2020 | Open file on RM Schematics |
| @pepeelectronica | 24 Apr 2022 | Open file on RM Schematics |
| @generalschematics | 15 Sept 2024 | Open file on RM Schematics |
| @generalschematics | 19 Oct 2024 | Open file on RM Schematics |
| @cidschematicandboardviewofficial | 21 Aug 2025 | Open file on RM Schematics |
| @cyberlanelectonik | 18 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 1 Aug 2026 | Open file on RM Schematics |
| @schematics_bios | 13 Aug 2026 | 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.