Firmware for the Realtek RTS5455 USB-C power delivery controller on Lenovo board NM-B911, with CRC32 checksum 0xC1CD2794 given for verification, in a 47.5 KB RAR. NM-xxxx is the LCFC numbering used for Lenovo motherboards. A corrupted PD controller can stop charging over Type-C or block power-on, and reflashing its small SPI chip with a programmer often fixes that. Compare the checksum after extraction, back up the original chip and confirm the board marking first.
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 @sm_bios. 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 | |
|---|---|---|
| @sm_bios | 18 Sept 2025 | Open file on RM Schematics |
| @smbiossupport | 18 Sept 2025 | 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 →