RAR archive for the IBM-labelled ThinkPad L410, listed under Lenovo, referencing Quanta and the GC7 project code, about 1.88 MB. The name indicates Quanta as the ODM behind this motherboard, and the contents are likely schematic material, though this is not stated. Extract with WinRAR or 7-Zip to check. Use it to trace power rails, follow the power-on sequence and identify shorted parts. Confirm that the GC7 project code and revision on the drawing match the markings on your board.
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 @alischematics. 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.