PDF schematic of the HP Compaq Presario CQ40 on Compal motherboard LA-4101P, 1.64 MB in size. The name does not state the revision or whether the Intel UMA or discrete graphics layout is shown, so verify this in the document and on the board. LA- codes identify Compal designs. With the drawing a technician can follow the power-on sequence, measure rails at the right points, look up part values and trace the source of a short.
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 @schematicslaptop. Enginerys does not host this file.
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How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.