Schematic — La-9413p Rev 1.0

Pin 8 ( VREG3 ) should output 3.3V. Pin 17 ( VREG5 ) should output 5V. If these are missing, the IC is dead.

The RT8223 needs EN1 and EN2 (pins 3 & 4). The schematic shows these come from the EC via S5_ENABLE . If missing, the EC is not booting. la-9413p rev 1.0 schematic

This will take you to the power section (usually page 14). Pin 8 ( VREG3 ) should output 3

Print the power sequence page and keep it next to your workbench. In the world of LA-9413P repairs, voltage always tells the truth—you just need to know where to look. Have you successfully repaired an LA-9413P board? Share your experience in the comments below (or on dedicated repair forums like Badcaps or Vinafix). The RT8223 needs EN1 and EN2 (pins 3 & 4)

A: Yes, but you also need a multimeter. Look for corrosion on the power ICs listed in the schematic. Clean with isopropyl alcohol and check resistance to ground using the schematic's resistance tables. Conclusion The LA-9413P Rev 1.0 schematic is more than a wiring diagram—it is a logical map of a complex computing machine. Whether you are repairing a dead short on a Compaq CQ45 or diagnosing a missing GPU voltage on an HP Pavilion G6, this document is your most valuable asset.

For a technician, finding the correct schematic diagram is not just helpful—it is absolutely essential. Without it, diagnosing a short circuit, missing voltage rail, or a corrupted BIOS is akin to finding a needle in a haystack.