I think it started when I spring cleaned the inside of my desktop system unit and accidentally plugged the front usb 2.0 connector (my pc is very old) to the motherboard in reverse. I didn't recognize it until I tried charging my phone through the front usb but my phone didn't charged at all and it suddenly got very hot instead.
After that, my phone won't charge through wall or usb anymore. It only displays that the phone is charging but the battery percentage is not really increasing. I already tried replacing the battery and also tried using a different wall charger and it's still the same. For now, I've been using an external battery charger since it's my only choice and I can't afford to buy a new phone.
Can somebody help me identify what parts were damaged and I need to replace in order to fix the problem? Do I need to buy an entire board replacement just to fix this?
BTW, I'm using i9100 Intl.
Thanks in advance.
Replace USB board/port; quick/easy/cheap (<US$15) to do yourself. KeithRoss39 has a guide in General which will enable you to get it done; there's a link to it in Hopper8's Odin Troubleshooting guide stickied in General if you can't find it with a search.
MistahBungle said:
Replace USB board/port; quick/easy/cheap (<US$15) to do yourself. KeithRoss39 has a guide in General which will enable you to get it done; there's a link to it in Hopper8's Odin Troubleshooting guide stickied in General if you can't find it with a search.
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Thanks for the response.
Are you sure it's only the USB board/port that I need to replace? btw, file transfer is perfectly working, charging is the only problem.
USB board malfunction has become a common fault with this phone (and to be honest, all Samsung phones). The board rarely dies completely all of a sudden, almost always shows a couple of faults but works OK in other ways.
Fairly sure this will fix your problem, and given how cheap it is, you might as well try it before you start spending serious money taking it to a service centre or local mobile repair shop. If that's not the problem, it's likely something else on the motherboard but as to exactly what, that's impossible to say without the phone in front of us.
Replace the USB board & see, given you've tried different batteries & charges, it points to the board/port.
The fact that your phone is functioning normally when you insert an externally (fully) charged battery would indicate that the problem isn't with the motherboard.
The USB charger/port board is connected to the motherboard and is pretty much the only part of the phone that separates the motherboard from the charger. As @MistahBungle says, everything points to that board being faulty, and replacing it really does cost pocket change and is something that is relatively easy to do.......
BTW....here is a link to the guide that mb mentioned....
http://forum.xda-developers.com/showthread.php?t=2335961
Make sure you read the first post in full before you begin....
Sent from my Markox powered KitKatted S2
Thank you. I'll give it a shot.
Related
I just bought a att sgs2 on craigslist.. mint condition but the something is wrong with the usb connector in the phone.. I've tried a few different cables and they all work the same.. nothing when I plug them in but if I push the cable hard into the phone's usb connector it will work. So I need to replace it or just start using an external charger. Anyone have experience replacing one of these? Any input would be greatly appreciated.
The USB port is messed up u will need to replace that small part but only a expert or Samsung can repair that or u can just use an external charger
Sent from my SAMSUNG-SGH-I777 using xda premium
lol, good luck with that. You're going to need some pretty legit soldering skills, IIRC. You might be better off just replacing the mainboard.
If your phone is less than a year old you can get it replaced under warranty.
It is a fairly easy repair if you have basic repair skills (no soldering is required).
The charging port is part of a separate pcb/ribbon cable assembly, which you can obtain from several on-line sellers (sorry, but I cannot post any URL's).
Also, there are several videos on youtube that will show you exactly how to disassemble the i777 (and r&r the part).
= Dan =
js40667173 said:
It is a fairly easy repair if you have basic repair skills (no soldering is required).
The charging port is part of a separate pcb/ribbon cable assembly, which you can obtain from several on-line sellers (sorry, but I cannot post any URL's).
Also, there are several videos on youtube that will show you exactly how to disassemble the i777 (and r&r the part).
= Dan =
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Thanks for that info. I've been concerned about the sturdiness/longevity of the usb connector on this phone since the day I got it. I've always been very careful with it, but things happen y'know. This is good to know because, even though it's covered by warranty, when/if mine decides to go I know it will be on day 366 of my ownership.
Right heres my first post, i have a very stange problem with my Galaxy s2
I plug in my charger (brand new one by the way) and it says its charging, but the battery indicator while the phone is on it doesnt move ( i have the percentage enabled and it stays at 3/4%)
so il switch my phone off over night, and charge it then. It then says while its switched off that is it charged to 100%, il switch it on, with charger connected and it will still say 100%, but as soon as i disconnect my charger the phone says 0% and switches off and will not switch on again.
iv tried another battery, an official one and an anker one with the same results. What do i do now?
by the way the phone has never had water damage, its not rooted and its not cfw.
its on android 4.0.4
Problem with USB/charging circuitry (which is relatively common; we see it on here all the time). Needs to be replaced. Service centre.
MistahBungle said:
Problem with USB/charging circuitry (which is relatively common; we see it on here all the time). Needs to be replaced. Service centre.
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that the charging port thing? if so its been replaced 3times so far
Not the USB flex/port, the actual board that holds the USB circuitry that the flex cable connects to. And if that's already been replaced & the problem is happening in spite of same, replace motherboard.
MistahBungle said:
Not the USB flex/port, the actual board that holds the USB circuitry that the flex cable connects to. And if that's already been replaced & the problem is happening in spite of same, replace motherboard.
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urgh thanks
Given everything you've mentioned & tried, I'm not seeing how it could possibly be a firm/software issue. So it definitely sounds hardware.
MistahBungle said:
Given everything you've mentioned & tried, I'm not seeing how it could possibly be a firm/software issue. So it definitely sounds hardware.
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if it is hardware and it is the charging circuit board, how come its saying its 100% charged then 0% immediately when i take the charger out? i agree that its hardware i just dont want it to be expensive!
Probably a short or something. As to how expensive it will be to fix it, if it's under warranty you shouldn't pay anything. If it's not, that will depend on how much authorised repairers charge for labour in your country. You could always try local mobile repair shops if it's not under warranty/authorised repairers want to charge you an arm & leg to have it repaired.
Hello everyone,
My S2 doesn't charge anymore. Not at all.
I know it's not a battery problem because I tried putting in the battery of a Galaxy 2 taht works, and it was all fine.
I've searched the Internet and came accross 2 types of tutorial:
1 - to change the USB connector
2 - to change the charging dock
How would I know whether I should change (1) only the connector or (2) the whole dock?
Thanks in advance
T.
Replace the entire USB board. Costs ~US$10 to do yourself. KeithRoss39 has a guide in General (search for 'Replacing USB charger board') which has all the info you need to get it done quickly/easily (and cheaply as previously mentioned).
I have the same issue.... see here:
http://forum.xda-developers.com/galaxy-s2/help/phone-hot-charging-powering-t2758536
Keith linked his guide in there too
@mistaBungle - Your signature is overshadowing your posts
As @MistahBungle says....replace the entire board. If you try to replace just the socket, you may well succeed.....but in the process you might damage other components.....which will mean replacing the board anyway...
Micro electronics and 'imprecisely' applied soldering iron heat is NEVER a good combination.......
My wife says I'm a phone geek....She's probably right
I suffer from the problem in s2 phone after it is installed with a charger
Begins with the phone restart alone
So do I disconnect
Is there a solution
Sounds like either the charger or the USB board in the phone. I'd replace the charger first given they're cheap/easy to get (you could always borrow someone elses just to test), then the USB board. You haven't mentioned whether you're running stock or a custom rom, so if you're running a custom rom, do a clean install of stock & test for a day or two to rule in/out a 'rom problem'.
Replacing the USB board is fairly easy (and doing it yourself will save you at least $50 in labour Vs paying a mobile repair shop to do it); KeithRoss39 has a guide in General (search for 'replacing USB charger board') which has all the info you need to get this done quickly/easily/cheaply (~US$10).
Whenever i connect my phone with USB to PC (windows 10) , it first alert as connected and then again for disconnected and then again connect and disconnect again and again. SO i am not able to transfer any data as MTP/Mass storage mode doesn't work as PC finally doesn't recognize it .
It's not Software problem It's Hardware one. So all solution related to flashing new ROM /factory reset didn't worked.
Already replaced USB cable and tried on different PC with same results even with correct drivers installed.
So it's fault in USB port , so swapped with friend's Galaxy S2 USB Board completely and again same problem.
I tried when i dissembled it but then there was no GSM network and same usb problem. assembled it back , GSM connection came but again same USB problem.
Though it charges but doesn't connect and shows properly on device manager also. Also sometimes it does detect AC charger as USB , then i disconnect and connect again , then it shows normal AC charger connected.
What's the real problem as even replacement USB board also giving same problem ? Is it problem with motherboard ?
HELP , it's very irritating.
Probably not the motherboard....My guess is the wrong version of the usb board.....There are 4 different 'revisions' of this board for the international i9100.
My guess is you brought the wrong one.
See this thread for details......
http://forum.xda-developers.com/showthread.php?t=2335961
http://i.imgur.com/rVnFwJM.jpg
keithross39 said:
Probably not the motherboard....My guess is the wrong version of the usb board.....There are 4 different 'revisions' of this board for the international i9100.
My guess is you brought the wrong one.
See this thread for details......
http://forum.xda-developers.com/showthread.php?t=2335961
http://i.imgur.com/rVnFwJM.jpg
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So are you sure it's just 100% USB problem not motherboard ? if yes then i can get it replaced by Local repair shop in less than INR.400 ($5.97) where he will make me sure it works well.
Sounds like a nice deal right ?
EDIT- I just checked the both my old board and the replacement board from my friend's S2 are same Rev no. 2.3 .
But still same issue though his phone might have USB problem.
Can you make sure it's just the USB board problem and motherboard has no role in it. ? so that i can just get the board replaced without any tension ?
My 'gut instinct' is still telling me that it's the usb connector........
IMO, this type of connector is pathetically fragile and simply cannot withstand repeated connection/disconnection over long periods of time. I have owned a number of devices that rely on a micro USB port, and on over 50% of them, either the port or the plug on the end of the supplied charger/connection lead has failed (and I treat my devices with care).
I have never heard of a motherboard causing these types of issues and I've been active on the S2 forums for nearly 4 years, so I've seen a *lot* of posts....having said that, it can't be entirely ruled out....The S2 is now 5 flagship devices out of date, and I guess that those devices that remain in service will start to exhibit new faults that only age can reveal.....
It's up to you if you want to replace the usb board, but bearing in mind the relatively inexpensive cost of the part (compared to the cost of the motherboard), it's as good a place to start diagnosing the issue as any....it's what I'd be doing if i were in your place......
http://i.imgur.com/rVnFwJM.jpg
keithross39 said:
My 'gut instinct' is still telling me that it's the usb connector........
IMO, this type of connector is pathetically fragile and simply cannot withstand repeated connection/disconnection over long periods of time. I have owned a number of devices that rely on a micro USB port, and on over 50% of them, either the port or the plug on the end of the supplied charger/connection lead has failed (and I treat my devices with care).
I have never heard of a motherboard causing these types of issues and I've been active on the S2 forums for nearly 4 years, so I've seen a *lot* of posts....having said that, it can't be entirely ruled out....The S2 is now 5 flagship devices out of date, and I guess that those devices that remain in service will start to exhibit new faults that only age can reveal.....
It's up to you if you want to replace the usb board, but bearing in mind the relatively inexpensive cost of the part (compared to the cost of the motherboard), it's as good a place to start diagnosing the issue as any....it's what I'd be doing if i were in your place......
http://i.imgur.com/rVnFwJM.jpg
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Thanks , will get the USB board replaced and will let you know how that goes ..
actually i have the same issue
i replaced usb board two times and that changed nothing (one was a new replacement, second that i use now it's an used original board )
still can't use my i9100 with pc
most things i can manage without a pc but still... sometimes it would be easier