Welcome to the definitive chip-level repair resource for the Acer Aspire E5-452G, utilizing the Compal A4WAZ/A4WAR LA-C351P motherboard architecture. This guide is curated specifically for hardware engineers and laptop technicians who require precise circuit diagrams and boardview files to perform complex board repairs, trace short circuits, and resolve power-on sequence failures.
Motherboard Specifications
| Feature | Details |
|---|---|
| Laptop Brand & Model | Acer Aspire E5-452G Series |
| Motherboard Code | Compal A4WAZ A4WAR LA-C351P REV 1A |
| Platform / CPU Architecture | AMD Carrizo-L / Kaveri APU Platform |
| EC / KBC Controller | ENE KB9022 Series |
| Primary Power Rails | VIN (19V), +3VALW, +5VALW, +VCC_CORE, +1.35V (DDR3L) |
Common Chip-Level Faults & Diagnostic Notes
- 19V DC-IN & Current Sense Resistor (PR301/VIN) Diagnosis: If the laptop is completely dead with no LEDs, check for a short-to-ground at the main current sense resistor (PR301). Common culprits include ceramic decoupling capacitors or a punctured high-side MOSFET in the CPU or GPU VRM sections. Inject 1V/2A and use thermal imaging to locate the heat source.
- 3.3V / 5V Standby Rail & PWM Buck Controller: The LA-C351P relies on an Always-On (ALW) controller to generate standby voltages. If +3VALW or +5VALW are missing, verify the EN (Enable) and VREG LDO outputs. A common failure point is a shorted EC (KB9022) pulling down the +3VLP/LDO rail.
- Power-On Sequence & BIOS/EC Firmware: If the board has standby power but fails to trigger, monitor the RSMRST# signal from the EC. Ensure the BIOS (SPI Flash) has communication on Pin 1 (CS#). For "No Display" or "Hang" issues, reflashing the BIOS and clearing the ME region (or equivalent AMD PSP firmware) is often necessary.
Free Schematic / Boardview Download
📥 Download ACER ASPIRE E5-452G COMPAL A4WAZ A4WAR LA-C351P REV 1A Schematic / Boardview
Direct file link. Verified clean archive.
Need Additional Repair Assistance?
Explore our technician resources:
- 🛠️ Diagnose No-Power & Short-Circuit faults step-by-step: Interactive Laptop Diagnostic Lab
- 🛒 Original Replacement Motherboards & IC Components: Official Spare Parts Mega Store
