Asl50 Lac921p Rev 10 Schematic Exclusive 📌

Verify that the KB9022Q has 3.3V on its VCC pins and that the lid switch signal ( LID_SW# ) is sitting high at 3.3V. A stuck magnetic lid switch will trick the board into thinking it is closed, preventing a display turn-on.

Check the resistance of all large inductors (coils) relative to ground. asl50 lac921p rev 10 schematic exclusive

Disclaimer: Repairing electronics involves risks. Ensure the power supply is disconnected before working on the motherboard. Verify that the KB9022Q has 3