We had an iphone 6s in from a new customer that was reported for not turning on.
We plugged it in to charge through our usb ammeter but had no response at all from our charger.
When we first opened the device we could clearly see that it had had the shields removed and had been cleaned for water damage already. We next checked it plugged into the dc power supply. The phone turned on fine and seemed to have basic functionality.
We removed the board from the phone and found that the device had already been worked on previously, the tigris usb IC and the small audio IC had both been removed, we assume that these were damaged and possibly causing a short originally and that’s why they had been removed. We cleaned the areas and fitted new IC’s to test the phone. We tested for shorts and found none so we plugged a battery and charging port in to see if the phone would now charge. When plugged into the ammeter it appeared to charge up fine so we decided to reassemble the device.
Once reassembled we tested the phone, the battery charged fine, all audio was there, on headphones and both speakers. We where unable to find any further faults so we packaged it up and sent it back to our customer.