iPhone won't turn on and Heats when charging

[garnaout]

I bought an iPhone as a fun project off eBay to fix. The iPhone has no water damage (seller claim) and the sensors are all white (no red).

I started by installing a new battery and plugged it to the charger. The phone didn't turn on but started heating. The more I waited the more the heat started increasing until I smelled a burn so I disconnected it.

Any ideas where to start?

 

[The Doctor11]

Well burning smell is never ever suppose to happen warm is ok burning smell is not. Make sure the battery is in right and a good battery. And hold the home and sleep button at the same time until you hopefully see the apple logo. It won't be instant give it like 15 seconds to show the apple logo. Good luck tell me how it goes.

 

[garnaout]

That's the first thing I did when I got it, nothing.

 

[The Doctor11]

Has the battery ever been used in another iPhone?

 

[garnaout]

It is a new in the box battery.. can't test it on another phone b/c I have an iPhone 4s (and not iPhone 4).

I even took it completely out to tease it out and plugged to the charger, it gets warm (but not overheats) and stays warm (which I think is normal). However, no screen nothing. So i assumed it could be a bad screen so I started playing with the mute button but no vibration so assume it's off. Anyway I could test for a faulty logic board?

 

[The Doctor11]

It is a new in the box battery.. can't test it on another phone b/c I have an iPhone 4s (and not iPhone 4).

I even took it completely out to tease it out and plugged to the charger, it gets warm (but not overheats) and stays warm (which I think is normal). However, no screen nothing. So i assumed it could be a bad screen so I started playing with the mute button but no vibration so assume it's off. Anyway I could test for a faulty logic board?

Where did you buy it? It might be a cheap china battery. Sorry i'm not sure if you could test for faulty logic board