A universal support is provided in the present invention. The apparatus has a first interface configured to couple with the component, and a second interface configured to couple with the chassis. The front drive train is connected to the main shaft through a second slip clutch assembly that releases the front drive train from the main shaft if torque exceeds a predetermined limit. The compensating circuits inserted between the DAC and the signal lines are used to adjust the analog signals to correct the displaying brightness of the pixel devices. The side wall consists of an insulating resin, thus reducing the gap between it and the coil.