La-d401p Schematic |link| -

The (often labeled as BDL50) is a widely used Compal motherboard found in various 15-inch laptops, most notably the HP 15-AY series . For technicians and DIY enthusiasts, having the schematic is the difference between "guessing" and "diagnosing." 1. System Architecture Overview

The laboratory power supply immediately hits its current limit when injecting voltage, or the adapter light blinks/turns off when plugged in.

Testing inductors (coils) for short circuits to ground, which is a common cause of power-on failure. AliExpress Technical Resources la-d401p schematic

: Before diving into the schematic, always disconnect the battery and check the power adapter output. Many "motherboard failures" on this series are actually resolved by simple power rail resets or BIOS updates.

The Platform Controller Hub (PCH) and CPU sections are dense. Focus on: The (often labeled as BDL50) is a widely

For gaming laptops like the Legion Y520, the GPU (GTX 1050/1060) is a high-failure area. The schematic provides the voltage requirements for the GPU core (VCC_GFXCORE) and memory (VCC_GDDR). If these rails are missing, the schematic helps you trace the controller (e.g., NCP81215) back to its enable pin.

While the schematic tells you how components are connected, the shows you where they are located on the physical board. Testing inductors (coils) for short circuits to ground,

: Intel Skylake/Kaby Lake-U (integrated CPU and PCH on a single package).

: Ceramic filtering capacitors (MLCCs) near the CPU VCore or GPU power phases frequently degrade and short to ground.

: 6th Generation Intel Core (e.g., i7-6500U), which is soldered to the board (SOC). Graphics : Integrated Intel HD Graphics 520.

Signals with _EN stand for signals, which turn on localized power regulators.