Do you mean the USB port in the device? First, make sure it hasn't become clogged with dust or fluff which might be causing a bad electrical connection. If all seems well, it will need the attentions of a repairer. Bear in mind that the manufacturer is unlikely to repair a faulty USB port under the terms of the warranty, because it would be assumed to be user damage. You could take it to a reputable independent repairer if more convenient, or contact the manufacturer's customer service for advice on posting.
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