ThinkPad X240 firmware originally read from a dirty or corrupted chip and then marked as fixed, packed in a 5.45 MB RAR. The suffix 4MATIC seems to be a label from whoever repaired it, and the name does not explain it. Use this image as a recovery candidate when the X240 will not boot, but keep your own original dump first. Check that the image size matches the SPI chip, and verify the write before reassembling the laptop.
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 →