Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
As for the adapter or jack on your box being defective:
1. look into it, with a flashlight. Anything visible wrong, or dirty, linty, etc.?
2. does it have a lot of wiggle, when the power supply is plugged into it?
OK, then. It's probably the adapter that is defective.
I mean: the power supply is probably defective (I call them 'AC Adapters', which is why I said, 'adapter'.)
The AC Adapter can be obtained from here:
The first is about $9, the second about $15.
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