Lenovo laptop schematic for project HLS4I, Compal board LA-M652P, revision 1A, delivered as a 1.94 MB PDF. LA-xxxxP is Compal's board-numbering format, used on many Lenovo IdeaPad mainboards. The document lets you follow the power-on sequence, check voltages at the regulators, identify the EC and charger circuits, and look up component values. Any PDF reader opens it. Confirm that the LA number and revision 1A are printed on your board, because other revisions can differ in parts and nets.
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 @pkbiosbdv. 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.