Realtek RTS5455-family USB Type-C PD controller dump for Lenovo board NM-B421, provided as a 46.1 KB RAR archive. NM-prefixed board numbers follow the LCFC scheme, the Lenovo-owned ODM behind many IdeaPad and ThinkPad motherboards. Writing this image to the PD flash can revive USB-C charging when the controller firmware is corrupted. Make sure the board number on the PCB matches NM-B421, read and archive the original chip before programming, and check the result with a verify pass on the programmer.
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 @biosdumpcomputer. 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 | |
|---|---|---|
| @biosdumpcomputer | 21 May 2026 | Open file on RM Schematics |
| @Satale_bios_esquemas_Laptop | 2 Sept 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →