Chosen Solution

Hi, I have an iPhone 6 Plus. It worked fine until today, but now if I tried to charger it, but it has not taken any charge at all. I have tried connect to iTunes, but the iTunes did not recognise. I have changed the battery and changed the charging port as well, but the problem is still same. I have tried to use some different cables and chargers and to connect 2 other laptops. Have any one any idea please? Thank you. Atti

its possible that the tristar chip has gone bad