1.0 Schematic - La-9413p Rev

Symptom 3: Fan Spins, Lights On, but No Display (Black Screen)

Check if the +3VALW voltage is reaching Pin 9, 22, 33, 96, and 125 of the KB9012 Embedded Controller. Symptom 2: Power Light Turns On Briefly, Then Shuts Off

The "Always-On" rails are managed by a PWM controller (often a TPS series chip). The schematic will label these as and +5VALWP . Without these, the power button will never trigger the boot sequence. 3. The Charging Circuit la-9413p rev 1.0 schematic

To successfully navigate the , follow these industry-standard reading guidelines:

The schematic includes a chart. This is a "map" showing the order in which voltages must appear. If the laptop turns on for 3 seconds and dies, use this chart to find which "S-state" is failing. 💡 Pro Repair Tips for LA-9413P Symptom 3: Fan Spins, Lights On, but No

This comprehensive guide breaks down the core architecture, power rails, common failure points, and diagnostic steps associated with the LA-9413p motherboard using its official circuit schematic. 1. Architectural Overview and Specifications

Powers the ENE KB9012 EC chip and the BIOS IC ( U6001 ). Without these, the power button will never trigger

When navigating the multi-page LA-9413p schematic PDF, several localized circuits demand the most attention during troubleshooting: DC-In and Charging Circuit

If you find a short circuit on the B+ rail, do not inject 19V directly. Start at 1V with a current limit of 1A using a bench power supply. Feel the board or use a thermal camera to spot the component that heats up instantly (often a cracked ceramic decoupling capacitor).

Supports 4th Generation Intel Core (Haswell) processors, using the rPGA947 socket.