hi, I faced this problem in the last few days 2 times,after a lot of Google search,I found that it contains to main power ic work together, pm8841 and pm8941,the first one its like giving the order in my guest after the fixing,so I decided disassemble the phone and take a look ,so I opened it (you can find how to open your device by searching the Web) First time the problem solved by following this step: 1-disconnect the battery connector 2-connect your phone to wall charger ( after testing your charger) charging led will be on 3-reconnect the battery Now your phone it will turned on the problem get back with no sign of life to the phone after a week! I tried the first trick but no success! Second time: I remove the biggest cover metallic located at the middle which cover the ic , I remove the substance cooling, (The to small ic, NOT ON THE PROCESSOR!!!) reheat the ic pm8841, connect your charger and your problem iz solved! Dont forget to put cooling substance on the ic before reassembling the metallic...
