Lenovo firmware for the Realtek RTS5455 USB-C PD controller on an LV315KB main board, with CRC32 0xFB4A721A noted. The name gives the board label but no laptop model, so match it against the PCB silkscreen. Technicians reflash the controller's SPI flash with this image to recover a Type-C port that will not charge or negotiate power. Read and save the existing contents with a programmer before writing, and verify the checksum of the extracted file.
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 →