Are there any adjustments to increase voltage or current to small motor that rotates the 3 disc tray? When I disconnected the ribbon cable and substituted a battery to the motor it rotates the tray fine but when ribbon cable is connected I measure 2.3 volts going to the motor it and it doesn't rotate the tray unless you initially manually start the rotation. Then it will travel fine. Again the belt and I feel the motor are ok. Is there any thing I could do to increase the current or voltage to the motor?