I naively bought a used, broken T300 wheel to try and repair it as a companion to my T500RS. As I don't have a T300 wheel I just fitted the T500 wheel for the moment assuming they're the same. Most of what I experience applies when the wheel is removed: What's working: Wheel powers on when USB connects (internal PSU apparently OK) Windows driver installed and recognises wheel Firmware Update apparently successful Red mode light appears Tension of belt looks decent after adjusting Cables int/ext look sound The switch is set to PS3. What's NOT working: Wheel calibration routine kinda lamely runs through but not convincingly fast as compared to T500 Control Panel does not detect angle of wheel Control Panel cannot apply any Force Feedback actions No buttons react in control panel Wheel kind jerks pathetically when turned So I'd like to start testing components and doing a diagnosis of what needs replacing. Ideas, guides, links welcome! My feeling is the main board is probably shot AND/OR the motor's position sensor is faulty. Where is the rotational sensor? What is the PCB mounted to the end (back) of the motor's axle? Also, the fan runs constantly which I guess is good for cooling but may indicate a faulty thermostat?