Schematic set in PDF for a design code-named Hellcat, with ICL in the name most likely marking an Intel Ice Lake platform build. Neither the brand nor a board number or revision is stated, so verify against the markings on the PCB before using it for diagnosis. At 10.3 MB it should be a full multi-page set. Use it to trace power rails and enable signals, check sequencing around the PCH and CPU, and find which components share a net when hunting a short to ground.
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.