Schematic PDF for the IBM ThinkPad T61 laptop; the file name gives no board number or revision, so verify the planar variant against the drawing title blocks. At 2.21 MB it should cover the circuit pages a technician needs to follow power rails, the power-on sequence and signal paths between chipset, memory and peripherals. Any PDF viewer opens it, and searching by net name or reference designator speeds up locating parts. The T61 shipped in integrated and discrete graphics variants, so check which version these pages describe before trusting component values.
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 @schematicslaptop. 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.