Chosen Solution

Hey, today I tried to change my battery of my iPhone 6. Old battery removal and putting the new one in was quite smooth. To change the battery easier, I removed all four screen cables and also speaker module. After I put it all back together, noticed that after ~10 sec. after startup, processor gets really hot. I can feel it even from the back of the phone. After I did a little research about the problem, found out that it may be the front camera cable. But the camera and front speaker works well. Any ideas what can cause this problem?

It could be your battery too. Batteries that do not discharge properly can cause overheating. I would try to put the old battery in as a test.

Reball cpu n problem will be solved