Compal LA-4103P schematic for the HP Compaq CQ40 notebook, a 1.18 MB PDF. No revision is listed in the name, so check the title block against the board number and revision on the actual PCB. Compal's LA-xxxxP codes identify its mainboard designs, and HP has used several Compal platforms in this series. Use the document to trace the DC-in and charger section, follow standby and main power rails, verify signals around the EC and chipset, and locate the components on a shorted net.
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