Lenovo Yoga C740 motherboard pack for LCFC board NM-C433, compressed into a 2.84 MB RAR. The contents are not itemised in the name, but such packs usually contain a schematic or boardview. LCFC, the Lenovo-owned ODM, uses this NM- numbering on IdeaPad and Yoga boards. Check that the NM-C433 label on the PCB matches, then use the material to locate components, trace power rails and find test points when diagnosing no-power, no-charge or short-circuit faults.
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 @ShareMan_Electronic_Files. 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.