This allows you to visually trace the power flow without tracing gray lines for ten minutes.
The 5V rail transitions to "Run Power" at specific pin triggers (e.g., pins 8 and 9 of the regulator) during the boot process . lae791p rev 20 schematic better
PG_3V5V (pin 17) → EC_SYS_PWROK
: Specifies precise voltage outputs— 3.3V, 5V, 1.8V, and 1V —identifying which remain "always on" and which transition to "run power" at specific pins (e.g., pins 8 and 9 for the 5V line). This allows you to visually trace the power
If you are diagnosing a "No Display" or "No Power" issue with this board: lae791p rev 20 schematic better
Technicians often use this schematic to solve specific hardware failures: No +VCC_CORE: