A compact 116 KB PDF named after the BQ24737, a Texas Instruments notebook battery charger controller. The small size suggests a short datasheet or summary sheet covering pinout and the typical application circuit. Technicians open it in any PDF reader to locate the sense, gate drive and enable pins, check what voltage should appear on each pin, and judge whether the charger IC or its surrounding MOSFETs are responsible for no-charge or adapter-only faults. Compare the chip marking on the board before trusting the pin numbers.
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 @laptopbios21. 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.