Lenovo NM-C811 board firmware for the Realtek RTS5457V Type-C PD controller, packed as a small RAR. The name marks it as the code image and records a CRC32 checksum of 0x1CAD9E59, which lets you verify the extracted file before flashing. NM-xxxx numbers follow the LCFC pattern, the Lenovo-owned ODM. Technicians reflash this chip when USB-C charging or display output fails after a short. Match the board number on the PCB, back up the existing flash, and compare the checksum after writing.
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.
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 →