I just purchased a Pulsar Big Chance 777. For the most part everything works. But, the flourescent lights flicker and the 1,2,3, lights on the left hand side dim every once in a while. I measured the voltage acoss the 1,2, and 3 lights when the are dim and found them to be around 10 volts instead of 21 volts when they're bright. Does anyone have any ideas on the cuase? A bad power supply?