Schematic in PDF format named T42, 1.08 MB, pointing to the T42 notebook design; brand, board number and revision are not stated in the name. Use it to trace the DC input and charger stages, locate regulators feeding the CPU and memory, and follow signal lines when a component fails. Reference designators in the diagram help match parts on the board during measurement. Open it with any PDF reader and check that the motherboard number printed on the PCB matches the title block before trusting 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 @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.