Chosen Solution
I have just replaced the battery on my iPhone 5s and it won’t hard reset or power up. What can I do?
Why have you changed your phones battery? number of possibilities 1 the battery you have bought might be dead and needed activation or faulty battery 2 tristar(u2 or charging ic) might be faulty and won’t charge up dead battery, in this case try to use charges battery and see if it works. If you have tools you can Test you tristar. or activate the battery with battery activator or power supply.
