Astec MP6‑3Q‑00 is a 600 W, 24 VDC, single‑output, embedded switch‑mode power supply used in industrial control and servo drive enclosures. Common failure modes for this class include over‑temperature shutdown due to fan or heatsink blockage, capacitor electrolyte leakage or dielectric breakdown, and output voltage droop from degraded MOSFETs or inductors. First‑check diagnostics: verify input voltage and polarity with a multimeter; inspect the unit for visible signs of thermal damage, bulging capacitors, or burnt components; measure the 24 VDC output under load to confirm regulation within ±5 %; review any error codes or status LEDs on the host controller that may indicate power‑supply faults.[oss-gpt-20b]