A concise troubleshooting reference for hobby and small robotics servo motors. Covers common malfunctions including grinding noises, jitter, hunting, locking, humming, overheating, clicking, and erratic operation. For each symptom, probable causes and corrective actions are listed — such as inspecting gears for broken teeth, cleaning dirty potentiometers, upgrading to higher-torque servos, checking wiring and alignment, and replacing batteries. Most issues trace back to mechanical wear, power supply problems, or misalignment rather than electronic failures.
