mobile

My N750 with stock ROM 4.4.2 refuses to charge normally. The led was off which being connected to USB wall charger. However it showed a grey icon battery for two seconds before the screen was completely off. I had seen the error message popped before this happened. It said something related to Samsung power sharing software. Strangely I did not use power sharing and honestly I don't know what it means and I wasn't doing anything or plan to do things with power sharing. The screen was a little shaky when the error appeared although seconds after that the phones worked normally except I cannot charge my phone. I understand that the phone may have still received current from the charger however small, especially when I charge it under recovery environment which is inconvenient. It took 4 hours to reach 30 percent under Phil Recovery method.

I tried to clean the microUSB with a small sharp needle but have no luck. I also wiped the data and did factory reset and tried to use different ROM. But still it won't charge. I also tried to use different cable and different AC Adaptor (Sony original charge 2.5 volt) which was working under normal condition but not anymore. I never drop my battery and always recharge before reaching 30 percent. That's my ritual as I read from battery University that frequent charging is much better than letting the Lithium battery goes down to near zero.

Any ideas?
I tried different ROMs to find the best. Is it possible that Samsung crippled the phone after so many reflashes? This is scary.