La-d401p Schematic Portable Official
You're interested in the LA-D401P schematic!
The following key components are identified in the LA-D401P schematic: la-d401p schematic
- AC_AVAL → ALW (Always ON) → RSMRST# → PWRBTN# → SLP_S5 → SLP_S4 → SLP_S3 → VR_ON → SYS_PWROK → PLTRST#
What Exactly is the LA-D401P Schematic?
The LA-D401P is a reference code assigned by Compal Electronics (one of the largest ODM manufacturers for Lenovo, Dell, and HP). This specific board is predominantly found inside the Lenovo Legion Y520-15IKBN and Y720-15IKB gaming laptops. You're interested in the LA-D401P schematic
- SoC Power: The schematic reveals how the 3.3V and 5V rails feed into the CPU VRM. Cold solder joints on the BGA (CPU) are common on these boards; the schematic helps you confirm that voltage is arriving at the balls, helping you rule out a blown MOSFET before condemning the CPU.
- BIOS Chip: The SPI Flash layout is clearly marked. Since these boards often suffer from corrupt BIOS, the schematic pinout (Pin 1 VCC, Pin 2 Data, etc.) is vital for external programming.
A complete LA-D401P Schematic package typically includes several critical sub-diagrams for troubleshooting: AC_AVAL → ALW (Always ON) → RSMRST# →
Key Components
, which is often found in the same HP Spectre 13-v and 13t-v laptop families.