BIOS firmware for the Lenovo ThinkPad X1 Carbon 3rd Gen, machine type 20BT, supplied in a 5.79 MB RAR. The title gives no board number, revision or firmware version, so open the archive to see what dumps it holds. Such images let a technician restore a board whose SPI flash is corrupted, using an external programmer and clip or after desoldering the chip. Save a verified copy of the original chip first, as it stores serial and configuration data, and confirm matching sizes.
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 @biosfilebins. 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 →