Archive of 1.30 MB for the HP Evo 620. The name gives only the model, with no board number, revision or ODM. The Evo line was a business product family, so check the contents after unpacking to confirm whether they cover the right model and board. Service schematics of this sort let a technician locate components, check voltage regulators and trace the power-up logic on a unit that will not start. Compare any board code inside with the PCB marking. Unpack with WinRAR or 7-Zip.
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 @IT_SERVICE_WORLD. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.