@jay453 you did not tell us if you removed the EMI shields from the logicboard. This is a must. If you have no, clena the logic board once more with the EMI shiedls removed. Glad you found ou about the "Rice" myth. You ar right, does not do anything. Once your board is properly cleaned and since you already replaced the battery, I would suggest a new lightning post connector. It is possible that it got damaged. After that you need to consider giving up. Problem with water damage is that virtually any part may have failed. You can of course go ahead and try to find the shorted component etc. but rest assured that your phone will never be a reliable fully functioning phone. Post some images of your logic board with your question. Maybe we can see something obvious. Use [guide|21499|this guide] for that.