Lenovo laptop firmware for a Realtek RTS5457U Type-C PD controller on Compal board LA-J701P. The archive holds the code image, identified by CRC32 0xA0511C47. Compal uses the LA-xxxxP numbering, and the revision is printed on the PCB near the board number. Technicians write this to the controller's SPI flash when USB-C charging, data or display output stops responding. Confirm the board number matches, back up the existing chip with a programmer, and verify the checksum after programming.
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 →