Another copy of the ThinkBook 13s-IWL schematic, Lenovo board BM5884A version 1.2, as a 3.55 MB PDF. It shows the circuit pages needed to trace power rails, follow enable and power-good signals, and identify which parts share a net when chasing a short or a dead regulator. Any PDF viewer will open it, and searching for net names speeds navigation. Before using values or references, confirm the BM5884A code and V1.2 revision on the motherboard, as revisions may vary.
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 @pkbiosbdv. 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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)