ASUS K42F repair guide in PDF, about 453 KB, filed under schematics but closer to a service troubleshooting document. No board revision is stated in the name. Guides of this kind usually summarise the power-up flow, main voltages to measure, connector pinouts and fault-finding steps for no power, no display or charging problems. It pairs well with the full K42F schematics of revisions 1.0, 2.0 and 3.2; check which revision your board carries and use this guide for quick measurement targets.
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