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)
Before the power button is even pressed, the board must generate low-voltage standby power. +3VALW and +5VALW . la-e801p rev 2.0 schematic
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. If these rails are missing, the Super I/O
Understanding the LA-E801P Rev 2.0 Schematic: A Guide for Board-Level Repair If these rails are missing