PDF schematic for a board designated Z84FM, a variant within the Z84 code family. Nothing else is stated in the name: no revision, brand or laptop model. The roughly 900 KB document can be used to follow power-on sequencing, identify regulators and their feedback networks, and narrow down a shorted rail by checking what hangs off it. Any PDF viewer will display it. Check that the PCB silkscreen reads Z84FM rather than Z84F or Z84J, because sibling designs can differ in components and signal routing.
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 @CLRINDORE. 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.