RAR archive of about 2 MB labelled for the Lenovo IdeaPad Y470 notebook. The name gives no motherboard number, revision or document type, so open it to see whether it holds a schematic, a boardview or a firmware image. Repair documents for this model are normally used to follow the power-on sequence, find the components that generate each voltage rail, and locate test points while diagnosing a dead or shorted board. Compare the board number printed on your PCB with the one inside the files before working from them.
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.