PDF schematic covering the Lenovo C460M, C462M and G400, with Compal named as the board maker. The name ends at LA and gives no full board number or revision, so read the title block inside the document to identify the exact Compal LA-series board. Once matched, the pages help trace voltage rails, check charger and power-switch circuits and locate parts on a dead board. Check that the number printed on your mainboard agrees before using component values from these drawings.
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 @smschematics. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.