Chosen Solution
I replaced my battery and charging port on my iphone but I still cannot get it to charge or be recognized by my mac, I have tried different cords and charging methods yet it still wont work . Is the phone just fried at this point or is there something else I can try?
Assuming you have used a known-good replacement battery and charge port, then your problem probably lies on the logic board. Your phone has all the symptoms of a failed Tristar IC. This can be easily repaired by an experienced micro-solderer and it is certainly worthwhile for a phone such as the iPhone 6Plus. Look for a reputable repair shop that specializes in micro-soldering repairs.
