The functions of the Module can not be controlled after resetting (like the color wheel spinning automaticly) 1.Checking the distance between the Hall Components and the Magnet to see if the space is within 2-3mm, of it is too wide, narrow the Hall components and avoid touching the magnet 2.Disassembling the Hall Components and exchange them, checking if the Hall Components are broken or not, if they do we will offer a new one. Motor trembling or working inconsistently 1.Checking the motor if it is short circuit or not, if the motor is burning to stop working, you can checking the broken code(IC 3711) If the motherboard is broken, we can replace a new one. 2.Checking the screws of the pattern wheels and the color wheels to see if they are fixed or not. 3. The Hall component and the magnets have not been located precisely, the error will be fixed after resetting several times. The display panel shows nothing 1.The Display panel is broken 2.Check the seven cables that connected the display panel to see if they are released or broken. Beams cannot work properly and be located precisely on X-axis and Y-axis 1.There is too much dust on optical coupler, which results in the infrared cannot locate precisely 2. Checking the screws of the transport belt to see if it is fixed or not. 2.The optical coupler is broken because of the distance between the coupler and the optical coupler have not been fixed properly(to solve this problem, we have to ensure that the coupler is in the middle of the optical coupler, and make it has no connection with each other) 4. Check the screws of the stepping motor to see whether it has been fixed properly. 5.Check the belt to see whether it is broken or not.