Do you see any signs of near the USB-C ports?
The main system power bus distributed across the entire board. lad402p schematic top
Usually a micro-controller chip responsible for the keyboard, power button detection, fan control, and low-level system initialization. Do you see any signs of near the USB-C ports
with a pull-up to ensure Arduino high-voltage thresholds are reliably met. Sequencing Relays (G5LE-1A) driven by Darlington arrays allow safe 10-channel switching. power button detection
If your requires sequential behavior, the LAD402P is not the correct choice. Use LAD4P2 or LAD4P3.
To appreciate the , compare it to similar models: