Chosen Solution
I replaced the charging port and battery on my iPhone 8 and it refuses to charge the battery. It detects that the phone has a charging cord in it but it is permanently stuck on 0% and I don’t know how to fix it
Hi mate the way I would try and fix this issue is by going back to basics. Try putting the old charge port back in the phone with a new battery or try a new charge port with the old battery. Just test each part separately and see which changes your results. If you find that the old battery is working with a new charge port try buying a nother new battery.
If your phone detects it is connected to the charger it could be a board issue. There are two mosfets near the battery connector. If any one of these have been nudged it will produce the problem you are facing. You will need to check around the battery connector with some magnification as these components are very small. Make sure none are missing or have become loose.
