The Astec MP6‑3L‑0M is a 100–240 V, 600 W (up to 800 W) modular switching power supply used in industrial control and embedded systems. Common failure modes for this model include degraded or failed electrolytic capacitors on the input/output stages, fan motor burnout or bearing wear, transformer winding insulation breakdown, and over‑temperature shutdown due to inadequate ventilation. Begin troubleshooting by verifying that the unit receives proper line voltage and that all input/output connectors are secure; then measure output voltages with a multimeter while monitoring for ripple or dropout, visually inspect the board for bulging capacitors or burn marks, and check fan operation and airflow. If the power rails are within spec but the supply still fails, test the primary transformer and secondary rectifier diodes for continuity and leakage.[oss-gpt-20b]