I have a galaxy s3 SPH L710 i took out the charging port since i was going to replace it with a new one but didnt have it so put it back together without changing port. It turned on fine but then it gave me a lost mobile network so i restarted it and now it wont turn on at all. But i do see that when i put on the battery the backlighy flashes once and thats it. But still wont turn on. Any suggestions?