TC reported TIMS showed Front M2 car Smoke and Fire Detector Alarm lost power. ~~~~~ 2533 TC reported TIMS showed Smoke & Fire Detector Alarm lost power. CE: 2533 fire n smoke detector loss power, FC 735, self cleared OE: To check 2533 fire panel DC-DC output is 24VDC. Check connector to the fire panel is secure, and check for anywater seepage from FAD to the fire panel. Rectify any fault found.  2533 FC 735 registered. Fire & Smoke detector loss power 4X. Checked2533 fire panel DC-DC output - 24V. Cable connectors to fire panel secured. No sign of water ingress from FAD to fire panel. As PM, replaced DC-DC converter. Old: BSK-111NEE-0019J New: A103737 Aliff/Daniel/Chan SW 45267