: These stay "Always On" as long as the battery or charger is connected. They power the Power Button and the KBC chip so the laptop can "listen" for you to press the button.
The Keyboard Controller (KBC) is the "manager" of the motherboard. In the Osamu2 schematic, you’ll see pins like: : Serial Interrupt Request. LFRAME# / CLKRUN# osamu2-dis-kb-hpc mv-mb-v1 schematic
Because these boards use integrated AMD chips, display issues often require chip reballing or specialized heating/pasting if the internal processor fails. Technical Resources : These stay "Always On" as long as