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Samsung Galaxy S II I9100 does not charge properly

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m4rtin86
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Question Samsung Galaxy S II I9100 does not charge properly

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
 
wulsic
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@m4rtin86 So far as i can read it, it is the Battery which doesnt want to get always charged or the charging module like you said. Maybe you can borrow a friend's s2 to see or his battery charges in your phone. If it isnt the charger/usb cable then its battery/charging module.
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m4rtin86
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Originally Posted by wulsic View Post
@m4rtin86 So far as i can read it, it is the Battery which doesnt want to get always charged or the charging module like you said. Maybe you can borrow a friend's s2 to see or his battery charges in your phone. If it isnt the charger/usb cable then its battery/charging module.
I replaced the charging-module and phone started to charge again. However, I'm bit puzzled how such seemingly simple component could cause such behavior? All it seems to have are just micro-usb jack, microphone, few contacts for speaker, connector for antenna and some electronic components like resistors, SMD capacitors and that seems to be pretty much all. How could such a simple component cause phone to behave in such way?
 
wulsic
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(Last edited by wulsic; 3rd September 2014 at 10:58 PM.)
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@m4rtin86 I have no clue why that component behaved in such way, but weird things happen to stuff sometimes and nobody knows why and how it could happen. Maybe something was loose a bit and didn't made good contact anymore just sometimes maybe.
Its good to hear that your phone is charging normally again I hope it stays like that for the next 2 years atleast.
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Htc Elf-Htc Google Nexus One-LG Optimus 2X-Samsung Galaxy S2-LG Nexus4

"Simplicity is the ultimate sophistication."
"The greatest ideas are the simplest." William Golding
"Simplicity is the art of maximizing the amount of work not done." - Agile Manifesto
"Simplicity is the way a human/developer should think to easily solve problems." - Wulsic

My Work So far
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