The Tri‑Mag MFSP‑019 is a 425 W AC‑DC power supply (115/230 VAC, 50/60 Hz) that outputs ±12 V, +5 V, –5 V and a 25 A DC rail. Common failure modes for this class of industrial supplies include overheating of the internal rectifier bridge or switching MOSFETs, loss of output voltage regulation due to degraded capacitors or a failed voltage‑sense resistor, and fan or cooling‑fan failure leading to thermal shutdown. First‑check diagnostics: verify that the input mains is within spec and measure the output voltages with a calibrated multimeter; inspect for visible signs of overheating or component damage on the PCB (burn marks, swollen electrolytics); and confirm that any built‑in protection LEDs or status indicators are functioning as expected.[oss-gpt-20b]