Ensure you are using the Rev 2.0 file. Using a Rev 1.0 schematic for a 2.0 board can lead to incorrect voltage readings as components may have been moved or values changed to improve stability.
If these rails are missing, the Super I/O chip (EC) won't have power, and the laptop will appear completely "dead." 3. CPU Core Power (VCC_CORE)
Understanding the LA-E801P Rev 2.0 Schematic: A Guide for Board-Level Repair la-e801p rev 2.0 schematic
If the laptop won't turn on, check the first and second MOSFETs (usually located near the DC jack) to see if they are passing the 19V rail through to the rest of the board. 2. The 3.3V/5V "Always-On" Rails
Before the power button is even pressed, the board must generate low-voltage standby power. +3VALW and +5VALW . Ensure you are using the Rev 2
Most LA-E801P failures occur at the "front door." The schematic details the . Search for: VIN , BATT+ , and CHG_VCC .
The LA-E801P (often branded as the ) is a specialized motherboard designed for Dell’s ultra-portable 2-in-1 laptops. Because these devices prioritize a thin profile, the board is densely packed with surface-mount technology (SMT). Without the Rev 2.0 schematic, identifying a blown capacitor or a faulty MOSFET is nearly impossible by sight alone. Key Sections of the Schematic CPU Core Power (VCC_CORE) Understanding the LA-E801P Rev 2
Working with the LA-E801P Rev 2.0 involves measuring live voltages. Always use a current-limited DC power supply and ensure you are grounded to prevent ESD (Electrostatic Discharge) from killing the sensitive Kaby Lake CPU.