Mira applied flux, heated her tweezers, and lifted the tiny capacitor. It came off like a grain of black sand. She didn't even bother replacing it—for testing, the circuit could run without it. She powered up again.
Following the "Power Tree" on page 17, she traced the main power rail from the DC jack. The first stop was a pair of MOSFETs, PQ301 and PQ302, known as the isolation circuit. Their job was to protect the board from reverse polarity or overvoltage. ldb-2 mb 11232-1 schematic
She pulled up the on her cracked monitor. It was a 52-page PDF, dense with hieroglyphics: "PQ901," "PR303," "+V20," "SUSP#." Unlike a map of a city, this map showed the intent of the engineers. Every capacitor, every resistor, every MOSFET had a purpose. Mira applied flux, heated her tweezers, and lifted