The FCPS‑24FSPCA is a power‑supply controller PCB used in industrial fire‑alarm and safety systems, typically providing regulated 24 V output for notification panels and related modules. Common failure modes for this class of boards include burnt or cracked capacitors, degraded MOSFETs or voltage regulator ICs, and solder joint fatigue around the input/output terminals. First‑check diagnostics: verify that the board receives its rated input voltage and that the output rail is within spec; inspect all surface‑mount components for visual damage or discoloration; and review any diagnostic LEDs or status codes on the host system to isolate a power‑supply fault from higher‑level controller errors.[oss-gpt-20b]