I recently gave my iPhone to repair shop for battery replacement. when technician fist checked my iphone with new battery and its turned on and battery health was 100%. after he turn off the phone and removed the old battery an installed the checked new battery and tightened all the screws and tried to turn it on. but nothing happens. when he plug it in to a power supply and try to turn it on power supply showing near 118 mah power usage and back to zero. and its keep happening. could anyone please help me to fix my phone.