PDF schematic for an HP EliteBook 840 mainboard (spelled ElitBook in the name), board number 6050A2637901. The 6050A prefix is the Inventec numbering style used on many HP business notebooks and is printed on the PCB, so check it before relying on the drawings. The schematic is used to trace the power rails from the adapter input through the charger and regulators, verify enable and power-good signals, and locate the parts on a shorted rail. The EliteBook 840 was built in several generations, so a matching board number is essential.
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 @afsschematicfree. 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.