The most likely cause of the problem is that the motor is broken, preventing the rotation of the platter. In order, to fix the issue double check to see if the platter itself is damaged or broken. If, so replace that; in addition if it is not just the platter, go into the device and replace the motor. The attached guide for the Turntable Platter should assist in guiding you through the whole process found here [guide|61586|JTA-230 Turntable Platter Guide]