Iphone 5 dead drawing 0.1 to 0.4amps. From dc power supply


I got iphone 5 , initially it was drawing 0.40 amps from dc power supply without pressing power button so i detected short by heat detection, n find out u2 i s making it hot. I replaced the u2 now phone is drawing only between 0.1 to 0.4 amps for DCPS when i power on the phone and phone doesn’t comes on … any one know what could be the issue?

Sent from my iPhone using Tapatalk