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Hi there and welcome
The only thing they repair on this is the Screen. It is not cost effective to repair just thee port as its not worth it to the companies that do the screen repairs. Reason is nearly always it requires a new mainboard, and that exceeds the value of the Kindle.
What I tell my customers is look on ebay for a Kindle Fire with a smashed screen and replace the Mainboard in yours with this one which has the connection soldered to it.
But because of the value of these being low, no one will actually do the repair, plus Amazon do not sell the boards seperate.