Schematic for a board labelled JM50, revision 1.0, provided as a PDF of about 2 MB. The name carries no brand or laptop model, so identify the machine from the board markings and the title block inside. A circuit diagram is used to trace power rails, follow the power-on sequence, check the charging circuit and identify parts around a short. Open it in any PDF reader. Make sure the PCB revision is 1.0, because later revisions such as 3.1 may differ in circuit details and component values.
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 @schematicslaptop. 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.