Chosen Solution
Hey guys so I have an iPhone 7 I replaced the screen, the tapdic engine, the power connector, and also the battery. I got it to turn on for a second but, when I plug the charger it wont show the battery if its empty and I hit the power button but the phone wont turn on.
The possible region for that solution in my experience. 1 - Battery must be low charge,you have to use extra power source to power on and check. 2- New charging flex is slightly hard to fix on the connector confirm that properly connected. 3- Remove home button flex and check. 4- Check the battery BSI point might be loose contact.
please check the charging flex, Maybe it is not installed well
