Chosen Solution
I have changed the lightning connector and tried a working battery from an iphone 5 but the phone still does not switch on, Any one has any ideas…it has not dropped in water, its just stopped charging/// I am stuck
This is usually caused by cheap chargers, such as dollar store charging bricks or 12V car chargers. They don’t offer any protection circuitry and can let high or dirty voltages through which damage the charge circuit on the iPhone logic board. If you have already ruled out modular parts, then the only option is a logic board issue. This will require a micro-soldering repair. Look locally for a reputable shop that does micro-soldering repairs. Ideally, you want to find someone local but good workmanship trumps locality. There are many shops worldwide that do this so you shouldn’t have any problems finding them. Talk to them and ask how they do their work. Focus on good practices like proper cleaning of boards once completed etc. If you can’t find one locally, then consider mail-in repair. There are several reputable micro-solderers patrolling this forum.
