PDF schematic covering the IBM ThinkPad T60, 1.19 MB in size. Only the model is named, so the exact board number, revision and graphics variant are not indicated. T60 boards came in more than one configuration, and the board markings should be matched to the document before you trust it. Use it to follow the power-on sequence, find where a rail is generated, and check suspected shorts against the expected net. It can be read in any PDF viewer, where searching for net or reference names speeds up fault finding.
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.