Few days ago my Samsung Galaxy S II I9100
stopped charging properly. If I connected the micro-USB charger, the phone just didn't charge. I tried with another charger, but this did not help. As a next step, I cleaned the micro-USB socket with compressed air and contacts with isopropyl alcohol, but still nothing. If I turned the phone off and connected the charger, instead of charging, the phone started to boot up. Often after the bootup the phone charged for few minutes. According to Battery Widget
utility, the battery itself was healthy. As a next step, I made a factory reset, but this did not help. Installing the latest firmware didn't help either. Once those charging problems started, I also noticed that scrolling through messages or using the keyboard was bit disrupted and I often had to press a on-screen keyboard multiple times to print a letter. Finally I took the phone apart to inspect any visual faults, but there were none. All the connectors were properly connected and there were at least no visual signs of malfunction of electronics.
Has anyone seen such behavior? Is it possible that faulty charging module causes such behavior? I would doubt that as this charging module seems to be a fairly simple hardware detail and it's hard to see that this could cause a phone to behave like I described above