Solve charging problem in Samsung S3770 by tracing all charging port points on motherboard. Change charging port before apply jumpers as shown in diagram below or trace any missing point and apply jumper only that point. Some time mobile shows charging bar but not store battery, This fault mostly created if charging port lose or having carbon inside charging port. Here in diagram all points are traced and marked with color lines, observe diagram carefully and apply jumpers like diagram below.
Samsung S3770 charging problem solution with diagram help. This PCB diagram only for Samsung S3770, do not try this on other models.