There used to be a great thread about fixing these, but photobucket fotophucked us all and now you cannot see the photos
Here is a photo of the IVR "connector" The problem are the "teeth" looking things. These are the spring fingers that stick down below the board and connect with the spades on the IVR. Those spring contacts lose contact with the board, IE the silvery looking rectangles. You need to clean that up, flux it, and solder a good fillet all the way around
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