HIA105‑30 is a Hi‑Tron AC‑DC power supply that accepts 115/230 V input and delivers three regulated outputs (5 V, –5 V, and 48 V) with currents of 5 A, 1 A, and 1.8 A respectively, rated at 105 W. Common failure points for this class include burnt or swollen electrolytic capacitors on the input filter, damaged output rectifier diodes, and overheating of the internal switching regulator due to poor ventilation or a failed heat‑sink. First‑check steps: verify that the unit receives correct line voltage (115/230 V at 60/50 Hz) with a multimeter; inspect the input/output capacitors for bulging or leakage and test output rails against spec values; finally, check for any visible arcing or scorch marks on the PCB and confirm that the fan/heat‑sink is clear of dust.[oss-gpt-20b]