Hi, can any of you fellas help? I have been using a neo tat vivace for lining for about 10 months..this last week the power has been acting up. The machine labours and runs slow and the power supply votage display dims and the voltage decreases as if the machine is sucking the life out of it. This fault is intermittent and the machine will suddenly fire up and run perfect for a while before labouring again....My other machines run fine using the same supply, cords and foot pedal....