Circuit diagram for the IBM ThinkPad X31 compact notebook, supplied as a PDF of about 1.08 MB. The name gives no board number or revision, so check that the PCB markings on the unit you are repairing match the pages before relying on component values. Such a document lets you follow supply rails from the DC jack through the charger and regulators, check signal paths between chips and work out where a short to ground originates. It opens in any standard PDF viewer, where searching for net names speeds up navigation.
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.