The JLG Smart System AU3019 1600258 controller is a compact industrial control module used on aerial work platforms and other construction equipment. Common failure modes for this unit include power‑supply over‑voltage or under‑voltage causing the internal regulator to trip, degradation of the main IC (often a microcontroller or DSP) leading to intermittent logic resets, and corrosion or solder joint fatigue at the I/O connectors due to vibration. Initial diagnostics should verify the 24 V DC input with a multimeter, inspect all power supply capacitors and voltage regulators for bulging or leakage, and check the board’s main IC for visible damage; then review any stored fault codes via the JLG Smart System Analyzer kit (manual section 1) to pinpoint specific error conditions.[oss-gpt-20b]