She cross-referenced the schematic. PC403 was listed as "CAP, CER, 10µF, 6.3V, X5R, 0402." Its function was to decouple noise on the 5V_ALW line—the very line that woke up the embedded controller (EC) and told it to start the power sequence.
Deep in the back room of "Northside Electronics," an old oscilloscope sat next to a dented soldering station. This was the domain of Mira, a board-level repair technician known for resurrecting devices others called e-waste. On her bench lay a high-end laptop from nearly a decade ago. The owner's complaint was scribbled on a sticky note: "Dead. No power. Lights flicker once." ldb-2 mb 11232-1 schematic
Mira injected 1V at 2A into the main power rail using her thermal camera. She watched the screen. The 3V/5V standby area glowed faintly—not the main charging IC, not the CPU VRM. A single, 2mm x 1mm component, , was radiating a tiny orange dot of heat at 85°C. She cross-referenced the schematic
The "ghost" was exorcised.