1537 - FIRE & SMOKE DETECTOR LOST POWER. ~~~~~ 1537 FIRE & SMOKE DETECTOR LOST POWER. FC : 735(Train Prep)  1537 replaced power supply for fire & smoke detector. Function test - OK. Power Supply S/N : OLD : 103785 NEW : 103748  Shafie/Sarma/Karmarul/Lee PT/Alan 45263