If the laptop shows no signs of life and the charging brick's LED turns off when plugged into the laptop, a short circuit exists on the primary rail.
The is a High-Temperature Hall Effect Sensor produced by companies like Littelfuse or Sensata . It is an "unipolar" Hall switch, meaning it turns "ON" when a South magnetic pole of sufficient strength approaches the sensor and turns "OFF" when the magnet is removed. lah103p schematic new