Lenovo E220s documentation in a 1.63 MB RAR archive, tied to the Compal LA-7041P motherboard. Compal names its notebook boards LA-xxxxP and prints that number together with the revision on the PCB. The archive most likely holds the schematic, readable in a PDF viewer once extracted. It is useful for tracing the standby and main power rails, checking the battery charging circuit and identifying shorted components. Verify the board number on the unit before trusting the documentation for repair work.
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.