HP firmware archive named X360 MAIN LOCK, 14.3 MB, without a specific model or board number; the name hints at an HP x360 main BIOS related to a lock condition, but details are not given. It is likely intended for reflashing the SPI chip with a programmer. Because the target board is not identified, compare it against your own dump and board markings before writing. Always back up the original chip, and check that the image size suits your flash capacity.
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 @anztechnology. 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 →