PDF schematic covering the IBM ThinkPad T60 business laptop, roughly 1.19 MB in size. No motherboard number or revision is stated in the file name, and T60 boards came in more than one version, so confirm the PCB revision first. Repair work with this kind of file usually means tracing power rails, checking the enable and power-good chain when a board will not start, and identifying the component that pulls a rail low. Any PDF reader handles it; searching for net or part labels makes it much faster to use.
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 @alischematics. 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.