Safeline LTD 50H is a 100‑240 VAC industrial power supply rated at 330 W, commonly used as the power module in metal‑detection control boxes and other safety‑critical equipment. Known failure modes for this model include capacitor electrolyte leakage or bulging, transformer winding insulation breakdown leading to shorted secondary windings, and overheating of the internal switching regulator due to poor ventilation or a clogged heat sink. For units that exhibit output voltage sag, intermittent operation, or audible noise, inspect the electrolytic capacitors for discoloration or swelling, verify the transformer turns ratio with an ohmmeter, and check the temperature rise across the heatsink; replace any failed components and clean fan airflow if present. First‑check diagnostics: confirm input voltage stability (100–240 VAC), measure output DC rail voltages against spec, visually inspect for burnt traces or component damage, and review any error codes logged by the host controller.[oss-gpt-20b]