Sony laptop schematic in PDF form, labelled only with the project code GD1B. The name states no model, MBX number or revision. GD-series codes appear on Quanta-built VAIO boards, and the B suffix probably marks one of two related variants, so compare it with the GD1A sheet and the PCB markings first. Open it in any PDF viewer to follow power rails, check the charger and standby circuits, and locate the parts involved in no-power or no-display faults.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)