Short PDF of 161 KB with the numeric name 317091 and a browser copy marker, offering no information about the device, brand or board. At this size it is more likely a datasheet, application note or a short excerpt than a complete laptop schematic. Open it to identify the part or product described. Datasheets give pinouts, operating voltages and reference circuits that help when checking a regulator or controller in place, but always confirm the exact chip marking matches before using the 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 @one5technology. 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.