Ldb-2 Mb 11232-1 Schematic !!install!! Link

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.

To a layperson, it was just a green slab of fiberglass and copper. To Mira, it was a topographical map of a city—with power rails as highways, data lines as streets, and tiny black ICs as buildings. This board, often found in the Lenovo G580 or similar series, had a reputation. It was known for a "ghost in the machine": a fault that appeared, disappeared, and reappeared without warning. ldb-2 mb 11232-1 schematic

Without a healthy PC403, the 5V rail would ripple. The EC would see the instability and shut down in less than 20 milliseconds—hence the "lights flicker once" symptom. Mira injected 1V at 2A into the main