2002 Dodge Intrepid Radio Problem

About a year ago, my radio started cutting out for a split second, then returned. It would repeat a few times, then the problem disappeared. But, over time, it became more frequent. Now, it is almost constant power off-on-off-on-off-on. Sometimes is stays off completely. It is not position or movement dependent. It surely isn't a fuse because that would cut the power completely. So, is it the radio? Or, is it a loose connection that could be tightened? If so, where?