My S4 wont power up....
When I put the battery into my S4 it will vibrate and flash the galaxy s4 logo but it does not complete the start up. No swirly blue light, no yellow sprint screen, no noise.... i was having power cycling issues last night and today, we thought it was the power button but, my boyfriend is a tech for sprint and he ran all the tests, took it apart, cleaned it, everything looks fine and the diagnostics came back ok... I have photos of my daughter I would really like to try and save and recovery mode and safe mode dont work either. please help....