RAR archive of 1.14 MB for the IBM ThinkPad T60. Only the model is named, with no board number, revision or note on contents, so extract it and confirm what is included. T60 boards were produced with integrated and discrete graphics options, so make sure the documents match your planar. Typical use covers tracing power rails and signals, finding test points, and isolating short circuits with the help of the schematic or board layout.
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 @IT_SERVICE_WORLD. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)