Why is it not powering

@wavinyakio15570 could be a few different things. First check your charger. Make sure it has proper output. Then check your charging cable. Check to make sure connectors are not bend etc. After that, check the charging port. Clean it of any debris etc, use a few puffs of air to clean it out. If none of this works, get a USB ammeter and see if your phone draws any amperage from the charger. If it does not, it is possible that this is a charging port issue or a bad battery.

To check the charging port, use a voltmeter and measure the voltage on your battery connector. Next plug your phone charger in. Now measure the voltage on your battery connector. That voltage will have to have increased. If not then the issue is either the port or the charging circuit.

Also check the flex cable coming from the charging board to the main board. Check that for micro tears and corrosion and proper connection to the boards. I suggest that you start with a new battery if any of the above did not work. After that it's the charging board and then the flex cable.

Anything else would be related to the main circuit board. To work on that you will need the boardview files as well as the schematics. Of course, you will also need to have the knowledge to read the schematics and to know how to check components and circuits etc.

Since iFixit does nto yet have a specific guide for this, use something like this video to work on your phone. at 3:47 you will see the charging board. No, you do not need to remove the main board etc :-) to work on that.

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same issues with their device. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!