The AEP013 is an Arestech open‑frame power supply board commonly used in industrial control panels and TV backlights; it supplies regulated DC rails from a mains input via a transformer and rectifier section. Typical failures include burned or swollen electrolytic capacitors on the input/output stages, damaged bridge rectifiers, and shorted MOSFETs or driver ICs that cause over‑current shutdowns or no output voltage. Start by checking the AC input voltage and verifying the primary winding for continuity; then measure the DC output rails with a multimeter while the board is powered to confirm regulation. Inspect the board visually for scorch marks, bulging capacitors, or cracked solder joints, and review any error codes from connected controllers that may indicate power‑supply faults.[oss-gpt-20b]