Schematic in PDF for the nx9040 notebook, a model number used by HP Compaq, with KT3A appearing in the name as the board or project identifier; the file is 970 KB. No revision is stated, so check the title block. Technicians use such drawings to trace power rails, identify regulators behind a missing voltage and locate components on a short. Opens in any PDF viewer; make sure the board code and revision printed on the PCB match KT3A before trusting part 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 @smschematics. 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)