Schematic diagram of the IBM ThinkPad T40, stored as a PDF of about 1.08 MB. The name gives only the model, with no board number or revision, so match the document against the motherboard markings first, since early T4x boards came in different versions. Use it to follow power rails from the DC jack through the charger to the CPU and chipset supplies, identify parts around a short, and confirm values of resistors and capacitors. Any PDF reader opens it, and text search makes locating nets and reference designators quicker.
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 @cyberlanelectonik. 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.