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Old August 20th, 2010, 12:23 AM   #1 (permalink)
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Default The "USB Connected" notification stays on after the USB is disconnected

The "USB Connected" notification stays on after the USB is disconnected, there's no way to evict it other than a reboot but now will reboot only if USB is reconnected to PC or Charger.

How it as evolute:

I was so pleased by my new Galaxy S cell 3 days ago after a week of exploring and managing to get the best carrier and plan for this bright Samsung Smartphone. Then, the day after it lockup, but removing the battery for few seconds then replacing it back fixed that problem for that day. The following day been great too up the second lockup at night and this time, removing temporarily the battery did not permit to have the cell working anymore.

So today I have been trying all day to determine under what condition these lockups occur. During those tests, I've first determined that during charging or during USB PC connection, I could repower up the Galaxy S. Then the cell could work for long period of time if connected to USB PC or power supply, but when I remove the USB cable, the firmware fail to detect that there is no more USB connection and start to flash every couple of seconds the message "USB connected" replacing the status bar at the top of the screen.
Then after several minutes, the cell freeze, and only by removing for few seconds the battery and then plugging the charger again, will permit to successfully power up the phone.

I have of course made a Hard Reset to Factory Default, to no avail, during those tests. I think it's a hardware malfunctioning around the USB Port section. The connector look good seen with loop and both USB cable seem ok.

If it's corrected by an update, I wonder if I'll be able to re-flash under this condition.

Edit: Been seen on Samsung Captivate and Vibrant too here: my captivate wont turn on and says usb connected - Android Forums

Best solution follow:
Quote:
Originally Posted by XPhoneGuy View Post
I had the same problem as everyone else in this thread. My phone worked fine for two months. One day I was wearing a nasty imitation leather jacket and had the phone in my shirt pocket. It got kind of hot where I was and it got "steamy" inside that jacket before I took it off. The next time I looked at my phone it was doing the "USB Connected" dance. I tried power cycling and couldn't get the phone to power up, just got the grey battery symbol.

I tried a variety of things to fix this with marginal success. When I returned home I got the connector under a microscope and saw that there was some crud in the connector:



You really couldn't see it with the naked eye, you need at least 10 to 20X magnification and a good light source to see it. I turned off the phone, took out the battery, and squirted some canned air ("Dust Off") in the connector and blew a lot of that stuff out. However, there still was some dirt on the contacts. I took a small piece of coffee filter paper, wrapped it around the end of a small twist tie, soaked it in isopropyl alcohol, and swabbed out the connector. Here's the clean connector:



You need to be very careful about sticking things in the connector. The little tab that holds the contacts is fragile.

I powered the phone back up and it no longer displays the "USB Connected" message. It works correctly when I really do plug in a USB cable, too.

Why does this fix the problem? Well, I used to design cell phones, and I know a thing or two about the external connectors on phones. The phone has to have some way of detecting that something has been plugged into the connector. Micro USB connectors do not have a mechanical switch to detect the presence of a plug in the socket. If these connectors work the way USB OTG (On-The-Go) connectors work, there is a resistor in the cable between two of the pins. The phone attempts to pass a small amount of current through that resistor to detect the presence of the cable. When there is debris in the connector, like cotton fuzz from clothing, tiny bits of soap from washing, and tiny flakes of dead skin, and you add humidity from perspiration or rain, etc. you create little blobs of slightly conductive goo that can bridge the gap between the pins. That blob of goo looks just like a resistor to the electronics in the phone. So the phone thinks there's always something plugged into the connector. Why have some people been able to fix the problem with settings then? I suspect that they found settings that cause the phone to stop checking for a USB cable or to ignore the signal that tells the OS that something is plugged in.

I'd like to hear whether this solves the problem for others. While we're at it, does anyone know what those two extra contacts way at the back of the connector are for? Those aren't standard USB pins. I suspect they are used in manufacturing test.

Now if Verizon would only release Froyo for this phone...

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Old August 20th, 2010, 01:54 AM   #2 (permalink)
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Never happened to me. Are you using a Captivate or the original Galaxy S?
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Old August 20th, 2010, 07:15 AM   #3 (permalink)
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Galaxy S bought on ebay, from Hong Kong traded in AU $, shipped to Canada
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Old August 22nd, 2010, 04:48 PM   #4 (permalink)
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hi,
i have had the same problem with a uk galaxy s from vodafone bought around 2/3 weeks ago. basically after about 2 weeks i had the same recurring problem (usb connected rolling round/flashing when the usb cable was detatched) and the phone would turn itself off when on screentimeout, and would only display the battery charging 'sun' symbol, not the battery symbol and would not boot up, unless the usb/charging cable was attached. it would then boot up, but as soon as the usb cable was detached, i would get the usb connected flashing error.
luckily i was still within the 28 day return for faults period (which has since been reduced to 7 days, lucky me as the fault only appeared after 2 weeks) and vodafone immediatel;y exchanged the handset for a new one, whic so far has been fine.
from my observations though, i suspect that i had somehow accidentaly damaged the usb charging port on the phone. i say this because my new handset charger/usb cable has 2 small hooks that seem to lock it into the usb charger socket on the phone. i seem to recall that my old charger cable did not have this and it seemed to waggle about alot when placed in the charger socket. i would suspect that this is a possible design flaw in early models, which has sinse been corrected by this almost unoticeable upgrade.
i culd be talking rubbish and it may not be this at all, but i i remember looking at the usb charger socket on my phone and thinking that the small rectangular stickyouty bit seemed damaged in that it was not symetrical.
i will try and take some photos of my new charger/socket to explain better as i realise that my descirption is a bit wishy washy but its the best way i can explain it at the minute!
it would be usefull if you could check your charger/usb socket for any signs of damage etc...

Edit pictures added...usb hook.JPG

usb port 1.JPG

usb port 2.JPG
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Old August 23rd, 2010, 01:36 AM   #5 (permalink)
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Thanks CrêmeBrûlé, too late for me to check phone connector, seller asked to send back the phone and the battery, keeping the rest. It will take at less 3 weeks to have back a functioning phone. I've look at my 2 cable/charger connectors and they are perfect as I can see it.

All those who reported this trouble seem to have bought their phone about the same period. Must be a bad batch of some USB port components.
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Old August 29th, 2010, 11:37 PM   #6 (permalink)
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My Galaxy S was doing the same thing. I think it has something to do with the on usb connection settings (Settings, About Phone, USB Settings). I've since changed my to "Ask on Connection" and its been working fine. I previously had it set on the Mass storage mode. Perhaps try that and report back.
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Old August 31st, 2010, 12:44 PM   #7 (permalink)
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Hi, I just started reading here and I found this place really helpful.

Any news on this issue? I am able to connect my captivate to my windows 7 x64 pc and successfully mount the internal and external SD cards. After ejecting from my pc and turning off USB storage on my phone, I still have the USB icon on my notification bar. Am I missing anything?
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Old September 10th, 2010, 04:07 PM   #8 (permalink)
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Same problem here. Just started suddenly today.

Can't get rid of USB connection sign and can only reboot with cable connected.

Any solutions or does the phone need to go back?
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Old September 10th, 2010, 05:50 PM   #9 (permalink)
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Quote:
Originally Posted by Dillops View Post
Same problem here. Just started suddenly today.

Can't get rid of USB connection sign and can only reboot with cable connected.

Any solutions or does the phone need to go back?
When did you buy your Galaxy? My supposition is bad batch for the USB port component.

StephenNZ had a theory to test but he never came back with the result. I'm still waiting for return from repair or replacement.
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Old September 10th, 2010, 06:20 PM   #10 (permalink)
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Bought it on August 10, in a T-Mob shop.
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Old September 11th, 2010, 12:27 AM   #11 (permalink)
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Quote:
Originally Posted by Dillops View Post
Bought it on August 10, in a T-Mob shop.
About same time as mine.
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Old September 16th, 2010, 06:14 AM   #12 (permalink)
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Default Same symptom as my galaxy

So today I inspected the USB plug thoroughly and found that there was some corrosion in there..... The plug is so small it's difficult to see much, but after washing with paper soaked in anti-corrosion liquid the phone is working. So far.. (knock on wood).
The paper was well dirty afterwards.....
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Old September 18th, 2010, 08:41 AM   #13 (permalink)
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Quote:
Originally Posted by aaanekre View Post
found that there was some corrosion in there.....
What? corrosion!

What was exactly the symptom ?
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Old September 19th, 2010, 06:09 AM   #14 (permalink)
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Default USB Connected notification stays

I am also facing same problem. I am getting "USB Connected" notification even if I am connecting my charger. If screen locks, I can not unlock it and I have to reboot my phone. Even rebooting also gives problems and will start after 4-5 attempts. I tried factory reset but it doesn't seem to work. I have tried to flash my phone but still this notification is there. It sometimes goes away but I haven't observed any particular pattern about it. It comes back whenever I plug it in charger or my PC. This is really weird and I can not use my phone.

I called samsung service center in Hyderabad, India. They told me this is the first time they have seen this problem and I have to visit service center here. I will keep you posted about what service center has to say.

Please post if you find any solution in the meantime.

Thanks,
Prasad
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Old September 19th, 2010, 10:32 AM   #15 (permalink)
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Quote:
Originally Posted by pmmusale View Post
I am also facing same problem. I am getting "USB Connected" notification even if I am connecting my charger. If screen locks, I can not unlock it and I have to reboot my phone. Even rebooting also gives problems and will start after 4-5 attempts. I tried factory reset but it doesn't seem to work. I have tried to flash my phone but still this notification is there. It sometimes goes away but I haven't observed any particular pattern about it. It comes back whenever I plug it in charger or my PC. This is really weird and I can not use my phone.

I called samsung service center in Hyderabad, India. They told me this is the first time they have seen this problem and I have to visit service center here. I will keep you posted about what service center has to say.

Please post if you find any solution in the meantime.

Thanks,
Prasad
In "settings" activate DEBUG USB option, then restart the phone. Solved .
You can UNCHECK the debug and the phone still works. No HW problem, just software
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Old September 19th, 2010, 02:26 PM   #16 (permalink)
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If you go thru other posts in this thread, then you will realize it's not that simple. I have tried several times enabling debugging and then disabling it. This problem really does not have any pattern. For example, tonight I was getting same annoying usb notification and I was not able to unlock my phone once it was locked. I had to reboot it every time this happened. But when I kept it off for 2-3 hrs and when I started it, the notification went away. It's again normal. But I am sure it will pop-up next time when I plug it either in charger or USB data cable.

Regards,
Prasad
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Old September 20th, 2010, 09:39 AM   #17 (permalink)
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Here is another thread for same issue from T-Mobile forums.

Re: usb connected - T-Mobile Community
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Old September 20th, 2010, 11:32 AM   #18 (permalink)
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1. It seems really strange that we have so many usb hardware problems
2. it looks as a software problem, temporarily or definitely solved by activating USB DEBUG
3. isn't ROM related problem, it happens BEFORE ROM load
May be is related to some USB cables or some USB ports, activating a debug option , tempraruy solved checking and unchecking the USB DEBUG
4. I will suggest a usb port change, no USB HUB and usb debug mode activated
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Old September 21st, 2010, 12:53 AM   #19 (permalink)
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Hi Sergiopi,

Thanks for summarizing this. As I said earlier, this problem really doesn't have any definite occurrence pattern hence not definite solution yet.

Yesterday I observed that I started getting this notification and after few minutes I got a call. I was on call for 55 mins and surprisingly after my call USB notification was gone and my phone was normal. But I got it back when I charged my phone with charger this morning.

It's really strange that every one started getting this problem same time. I have bought my phone 7-8 weeks ago and it was working fine till last week.
I am going to flash it with my original DDJF3 firmware and want to see if it stays after that.

Will keep you posted.

Thanks,
Prasad
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Old September 21st, 2010, 08:14 AM   #20 (permalink)
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i have the same issues, plus sometimes when i charge through the wall charger mine thinks i'm using the usb and vice verser. sent mine back to 02 uk yesterday, will share what they say when i get phone back... upto 14 days tho to fix sadly.
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Old September 22nd, 2010, 06:59 AM   #21 (permalink)
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Update:
I flashed mine today with XXJF2 and did a clockworkmod recovery with my original back-up. I didn't root it or install any other application. Still I started getting "USB Connected" notification after putting it in USB. I tried my charger as well as PC USB cable.

So I am going to Samsung Service center this weekend. This doesn't look like software problem anymore rather a hardware problem. Will keep you posted.

Thanks,
Prasad
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Old September 25th, 2010, 11:46 AM   #22 (permalink)
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Thumbs up Problem solved

Menu, settings, applications, development, USB debugging - unchecked.

Menu, settings, applications, USB settings, check on connection - checked.

Restart phone and PROBLEM SOLVED!
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Old September 28th, 2010, 10:39 PM   #23 (permalink)
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Quote:
Originally Posted by Fapple View Post
Menu, settings, applications, development, USB debugging - unchecked.

Menu, settings, applications, USB settings, check on connection - checked.

Restart phone and PROBLEM SOLVED!

Anyone can confirm it work for them too.

Up to now mine could be lost in the mail. Hard to admit but I've shipped via very cheap air mail without tracking and very under-insured by inadvertence. In future I will buy locally for such expensive item. My first move was to find service from Samsung Canada but they only deal with their product sold in Canada
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Old September 29th, 2010, 10:18 AM   #24 (permalink)
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For me that never worked.

As posted earlier, I flashed my phone 4 days ago...I got USB notification with my charger on same day. But surprisingly after that day I didn't get any such notification till now even after my charger so many times. At that time, I didn't do anything...It was gone on it's own.

So I will do some more experiments if I get it again and will keep you posted.
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Old September 30th, 2010, 01:52 PM   #25 (permalink)
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this also happened to me after a recent usb/mass storage connection with my pc..now is reoccurring problem after anytime is plugged into usb whether for charge or connecting to pc..sometimes the "usb connected" notifications are a second or so apart sometimes it is so soon it dosent have time to register on my slide down notification screen just on top home screen..

teh only thing that has been able to stop this from continuing is to unplug battery but even that sometimes doesnt stop it and im sure once i charge or connect to pc will happen again..only thing i can think is there is some hardware problem activating this notification..but who knows..

you would think after so many different people having this problem Samsung would make some sort of announcement or atleast acknowledge this as an issue
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Old September 30th, 2010, 04:56 PM   #26 (permalink)
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well I got my phone back from repair place today...have been sent the same phone back without repair because they said it had water damage..even tho it has not been in any water...unbelievable cheek of them
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Old October 1st, 2010, 12:06 PM   #27 (permalink)
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Originally Posted by kend82 View Post
well I got my phone back from repair place today...have been sent the same phone back without repair because they said it had water damage..even tho it has not been in any water...unbelievable cheek of them
We still never had an official verdict for the cause of this mal-fonction. I absolutely reject the water damage diagnostic.
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Old October 3rd, 2010, 12:27 AM   #28 (permalink)
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Quote:
Originally Posted by Fapple View Post
Menu, settings, applications, development, USB debugging - unchecked.

Menu, settings, applications, USB settings, check on connection - checked.

Restart phone and PROBLEM SOLVED!
Quote:
Originally Posted by Got View Post
Anyone can confirm it work for them too.

Up to now mine could be lost in the mail. Hard to admit but I've shipped via very cheap air mail without tracking and very under-insured by inadvertence. In future I will buy locally for such expensive item. My first move was to find service from Samsung Canada but they only deal with their product sold in Canada
so far keeping these settings has worked..i've charged my phone numerous times & connected vis usb to my pc..after i finished using mass storage set back to check on connection and it hasnt been flashing "usb connected" on my notifications..i'm just keeping my fingers crossed that its just a settings thing and not some software/hardware glitch or malfunction!
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Old October 4th, 2010, 06:06 AM   #29 (permalink)
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absolutely ridiculous!!! i sent my phone off with Vodafone about a week ago with the same problem and got it back today and they didnt do anything to fix it and they are claiming it is water damage so they cant attempted to repair it!! there is no visible water damage, they are trying to claim that it might not be as obvious as that as it could be condensation! condensation to break a £400 phone!!!

has anyone came up with any solutions? or ways of proving that it is not a water damage issue as this has apparently now voided my warrenty!
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Old October 18th, 2010, 07:27 AM   #30 (permalink)
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My solution for now...
Have the USB connected to your PC and shut down the phone.
Keep the USB connected to your PC and start up the phone as normally.

It came back for me with USB debbugging on, but after disconnecting it it didn't show up connecting anymore. Though I'm not eagered to do a reboot with the phone once more
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Old October 29th, 2010, 12:35 PM   #31 (permalink)
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'tis annoying.

I have a Samsung Galaxy S and only recently has it started playing up (perhaps 5 weeks old?).

Kept flashing up USB Connected (when it was not) and USB debugging. Solved that through advice on here, but can't stop it from going into a 'coma' and having to take the battery out to get things going again. GRRRR. I'll see if O2 can help me.
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Old November 8th, 2010, 06:12 AM   #32 (permalink)
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Corosion. I scratched usb input with thin wire few minutes, later everything worked perfectly. Thanks for advice
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Old November 9th, 2010, 05:11 AM   #33 (permalink)
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Corosion. I scratched usb input with thin wire few minutes, later everything worked perfectly. Thanks for advice
had same problem, and did this and issue is resolved.
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Old November 10th, 2010, 10:57 AM   #34 (permalink)
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Originally Posted by Got View Post
Anyone can confirm it work for them too.

Up to now mine could be lost in the mail. Hard to admit but I've shipped via very cheap air mail without tracking and very under-insured by inadvertence. In future I will buy locally for such expensive item. My first move was to find service from Samsung Canada but they only deal with their product sold in Canada
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Corosion. I scratched usb input with thin wire few minutes, later everything worked perfectly. Thanks for advice
So... seem that cremebrulay in his first message including pictures was near the solution. It's terrible that I lost my Galaxy S by sending it back to seller too early. I’ve switched to Nexus One as a replacement and now I learn that Nexus Two will be a Galaxy S. If I had knew I would have waited. Might be still time to cancel and wait for the Nexus Two. I'll see.

Thank all of you for the help.
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Old November 25th, 2010, 04:47 PM   #35 (permalink)
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Default galaxy s water damage

Quote:
Originally Posted by kend82 View Post
well I got my phone back from repair place today...have been sent the same phone back without repair because they said it had water damage..even tho it has not been in any water...unbelievable cheek of them
same thing here just got mine back from vodafone and they said it had water damage in the usb port furious at them never been anywhere naer any water getting in touch with samsung tomorrow and seeking legal advice only had it two months
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Old November 25th, 2010, 05:03 PM   #36 (permalink)
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same thing happened to me today got mine back and vodafone said it could be moisture in the air how stupid can that be there is moisture in the air everywere in the world going from a hot house into the cold you get condenstion but it should not afect the phone as its mobile if you have to stay in the house were its warm and drie then its not mobile is it getting legal advise on this one its a desin fault as copper contacts and moisture dont go together should be stainless steel contacts need recall sped it about in a electical engineer so i no
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Old November 30th, 2010, 08:38 PM   #37 (permalink)
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Menu, settings, applications, development, USB debugging - unchecked.

Menu, settings, applications, USB settings, check on connection - checked.

Restart phone and PROBLEM SOLVED! It worked....thank you
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Old December 4th, 2010, 09:12 PM   #38 (permalink)
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I've had this problem for 5 days now. Let me tell you how this problem starts

1) It flashes with usb connected on and off
2) If left inactive for any amount of time the phone will switch off in coma mode
3) I press the power button to switch back on, and all I get is a little white circle rotating, then disapears
4) Only way to reboot is to plug it into a power source either charger or usb pc cable when the battery charger image on the screen shows

**I know at least half of you have experienced this so far**

When I plug it in, reboot, all is fine. I change the USB options to take away the flashing usb connection errors, but if I leave it inactive, it still turns off with the same problem

Ohhh, how close it is to being smashed up lol. Luckily enough I purchased mine back in July about 6 months ago......... I'm guessing 99% if you did too. If so, then read on.... You are covered by Samsung directly... Screw the rip-off insurance, and anything else.. (you'll just pay an excess from the provider to get it repaired/replaced)

You can update the latest firmware to 2.2 via Kies, but it will not solve the problem. The problem isn't a hardware defect. They will say this (in this order)

1) Carry out a battery calibration
2) Replace the battery
3) Update the firmware
4) Change settings to power saving
5) perform a factory reset

But in reality in the real world, who the hell is going to pay money for a new a battery on a "possible" solution when it's a £400 phone near xmas? Or fiddle about the mobile so much to get it to... hmm I duno... WORK?! Screw that!!! Samsung have an obligation to repair it "free of charge" within a year of purchase and don't let anyone else tell you otherwise, which is exactly the same boat I'm in

I called up my provider to tell them exactly what I think of my mobile, and they asked if I was insured. I responded back with "I'm not an idiot, I'm not paying an extra tenner a month for accidental damage for 12 months" (manufacturer has an obligation to repair faults within a year of purchase). I have home insurance which covers this alone. I told them I've only had the phone half a year, and that they "by law" must repair any fault "free of charge".. After a 5 min hold on the line, I'm answered by another guy, who confirms and states that I back up any data, or media on the phone and send it into them who will send it off to Samsung who will then repair or replace it free of charge

I'm verrrry far on Imobsters, and world war, and have apps that I need backed up, so once I do so, this mobile is getting replaced...

RAM & CPU are the reason my phone is starting to shut off. I have downloaded some music, some more apps, and quite frankly the mobile can't handle it, or the updates that other apps - FaceBook, GPS etc have.

Don't accept any crap like water issues, that's a cop out to avoid replacement, which most of you will be entitled to
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Old December 6th, 2010, 12:56 PM   #39 (permalink)
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So... seem that cremebrulay in his first message including pictures was near the solution. It's terrible that I lost my Galaxy S by sending it back to seller too early. I’ve switched to Nexus One as a replacement and now I learn that Nexus Two will be a Galaxy S. If I had knew I would have waited. Might be still time to cancel and wait for the Nexus Two. I'll see.

Thank all of you for the help.

And now, 105 days after having shipped my phone to HK, my parcel has been returned to me today, undecipherable reasons. Still working good (not yet addressed the *USB connected* situation). I will return the Nexus One tomorrow (I had 30 days to cancel the deal). And they announce the Nexus S now. Good Lord...

I hope I will be able to find a way to repair myself the Galaxy S. I will reread this thread again.
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Old December 6th, 2010, 07:18 PM   #40 (permalink)
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this is ridiculous i have samsung galaxy s bell version and have the same problems; i cannot believe google is actually contracting out their new vanilla dev. droid phone to samsung after this catastrophe.

samsung is garbage.
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Old December 8th, 2010, 08:35 PM   #41 (permalink)
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And now, 105 days after having shipped my phone to HK, my parcel has been returned to me today, undecipherable reasons. Still working good (not yet addressed the *USB connected* situation). I will return the Nexus One tomorrow (I had 30 days to cancel the deal). And they announce the Nexus S now. Good Lord...

I hope I will be able to find a way to repair myself the Galaxy S. I will reread this thread again.
I have returned the N1.

Up to now, the "USB Connected" notification didn't show up after 3 days and about 10 recharge or Kies cable connexions.

My question now: Does the Asian international version I9000ZSJF7 Eclair 2.1 will eventually be upgradable to Froyo 2.2 simply via Kies update?
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Old December 19th, 2010, 11:26 PM   #42 (permalink)
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Default "USB Connected" problem solved, at least for me.

I had the same problem as everyone else in this thread. My phone worked fine for two months. One day I was wearing a nasty imitation leather jacket and had the phone in my shirt pocket. It got kind of hot where I was and it got "steamy" inside that jacket before I took it off. The next time I looked at my phone it was doing the "USB Connected" dance. I tried power cycling and couldn't get the phone to power up, just got the grey battery symbol.

I tried a variety of things to fix this with marginal success. When I returned home I got the connector under a microscope and saw that there was some crud in the connector:



You really couldn't see it with the naked eye, you need at least 10 to 20X magnification and a good light source to see it. I turned off the phone, took out the battery, and squirted some canned air ("Dust Off") in the connector and blew a lot of that stuff out. However, there still was some dirt on the contacts. I took a small piece of coffee filter paper, wrapped it around the end of a small twist tie, soaked it in isopropyl alcohol, and swabbed out the connector. Here's the clean connector:



You need to be very careful about sticking things in the connector. The little tab that holds the contacts is fragile.

I powered the phone back up and it no longer displays the "USB Connected" message. It works correctly when I really do plug in a USB cable, too.

Why does this fix the problem? Well, I used to design cell phones, and I know a thing or two about the external connectors on phones. The phone has to have some way of detecting that something has been plugged into the connector. Micro USB connectors do not have a mechanical switch to detect the presence of a plug in the socket. If these connectors work the way USB OTG (On-The-Go) connectors work, there is a resistor in the cable between two of the pins. The phone attempts to pass a small amount of current through that resistor to detect the presence of the cable. When there is debris in the connector, like cotton fuzz from clothing, tiny bits of soap from washing, and tiny flakes of dead skin, and you add humidity from perspiration or rain, etc. you create little blobs of slightly conductive goo that can bridge the gap between the pins. That blob of goo looks just like a resistor to the electronics in the phone. So the phone thinks there's always something plugged into the connector. Why have some people been able to fix the problem with settings then? I suspect that they found settings that cause the phone to stop checking for a USB cable or to ignore the signal that tells the OS that something is plugged in.

I'd like to hear whether this solves the problem for others. While we're at it, does anyone know what those two extra contacts way at the back of the connector are for? Those aren't standard USB pins. I suspect they are used in manufacturing test.

Now if Verizon would only release Froyo for this phone...
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Old December 23rd, 2010, 08:14 PM   #43 (permalink)
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WOW, great visual description of the problem.

Although mine is now working well after this period of over 3 months with battery removed and having gone to freezing temperature for some day.

Maybe only because here, in winter, it's getting very dry inside. Anyway, if ever the *"USB Connected" dance* as you call it, ever come back, I will try your cleaning technique.

Thanks a lot.
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Old January 4th, 2011, 08:28 AM   #44 (permalink)
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Originally Posted by bambam82 View Post
My solution for now...
Have the USB connected to your PC and shut down the phone.
Keep the USB connected to your PC and start up the phone as normally.

It came back for me with USB debbugging on, but after disconnecting it it didn't show up connecting anymore. Though I'm not eagered to do a reboot with the phone once more
Thank you bambam...your solution worked for me...was beginning to get worried that I was the only one facing this problem and only found the community today... tried some of the other solutions in the thread but yours has worked!! awesome!!
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Old January 4th, 2011, 06:23 PM   #45 (permalink)
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XPhoneGuy, thanks a ton for posting this!

My phone got a bit wet this morning as I had it on the bathroom sink after I showered. I really only thought I had got a few drops of water on it. Anyways I had the USB connected signal flashing, boot-up problems, etc like everyone here. I tried the USB settings menu described here to no avail.

So after your post, I folded some toilet paper over a few times, and pushed and prodded it into the USB connector with a steak knife (sounds murderous, but it wasn't!).

Long story short, I still got the message flashing problem but on the next boot-up everything is back to normal!

Sooo I would say ... dirt/water contamination is probably the cause to most of these message flashing issues.

Samsung should really have a folding rubber cap over the usb port if it's this critical and easy to dirty.

Peter
Quote:
Originally Posted by XPhoneGuy View Post
I had the same problem as everyone else in this thread. My phone worked fine for two months. One day I was wearing a nasty imitation leather jacket and had the phone in my shirt pocket. It got kind of hot where I was and it got "steamy" inside that jacket before I took it off. The next time I looked at my phone it was doing the "USB Connected" dance. I tried power cycling and couldn't get the phone to power up, just got the grey battery symbol.

I tried a variety of things to fix this with marginal success. When I returned home I got the connector under a microscope and saw that there was some crud in the connector:



You really couldn't see it with the naked eye, you need at least 10 to 20X magnification and a good light source to see it. I turned off the phone, took out the battery, and squirted some canned air ("Dust Off") in the connector and blew a lot of that stuff out. However, there still was some dirt on the contacts. I took a small piece of coffee filter paper, wrapped it around the end of a small twist tie, soaked it in isopropyl alcohol, and swabbed out the connector. Here's the clean connector:



You need to be very careful about sticking things in the connector. The little tab that holds the contacts is fragile.

I powered the phone back up and it no longer displays the "USB Connected" message. It works correctly when I really do plug in a USB cable, too.

Why does this fix the problem? Well, I used to design cell phones, and I know a thing or two about the external connectors on phones. The phone has to have some way of detecting that something has been plugged into the connector. Micro USB connectors do not have a mechanical switch to detect the presence of a plug in the socket. If these connectors work the way USB OTG (On-The-Go) connectors work, there is a resistor in the cable between two of the pins. The phone attempts to pass a small amount of current through that resistor to detect the presence of the cable. When there is debris in the connector, like cotton fuzz from clothing, tiny bits of soap from washing, and tiny flakes of dead skin, and you add humidity from perspiration or rain, etc. you create little blobs of slightly conductive goo that can bridge the gap between the pins. That blob of goo looks just like a resistor to the electronics in the phone. So the phone thinks there's always something plugged into the connector. Why have some people been able to fix the problem with settings then? I suspect that they found settings that cause the phone to stop checking for a USB cable or to ignore the signal that tells the OS that something is plugged in.

I'd like to hear whether this solves the problem for others. While we're at it, does anyone know what those two extra contacts way at the back of the connector are for? Those aren't standard USB pins. I suspect they are used in manufacturing test.

Now if Verizon would only release Froyo for this phone...
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Old January 7th, 2011, 06:09 PM   #46 (permalink)
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Samsung should really have a folding rubber cap over the usb port if it's this critical and easy to dirty.

Peter
Ah? Mine is Intl Galaxy S and there is a sliding door closing the USB port.
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Old January 8th, 2011, 10:41 AM   #47 (permalink)
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Thankyou XPhoneGuy that has fixed the issue that was defo the problem! A bit of folded toilet paper and a dinky screwdriver did it a treat!
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Old January 8th, 2011, 11:45 AM   #48 (permalink)
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I have a samsung Galaxy, mine became faulty e.g. it would switch its self off, say that it was connected to the USB port when it wasnt, and then it would show the loading dial, etc...

I sent it back to the company my contract is with and they told me it was condensation damage and they couldnt fix it and sent it back, minus all but one of the screws that hold it together.

Needless to say I was less than happy and I contacted Samsung directly and I was told to send my phone to them. I have recieved it back after a week working good as new. They told me it was a fault with the PBE board and not condensation damage.

I dont have insurance on my phone and it was fixed by samsung free of charge as the problem wasnt caused by me.

Your phone company is fobbing you off with the excuse of condensation damage!!
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Old January 10th, 2011, 09:44 AM   #49 (permalink)
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Yep I feel pretty stupid posting that ... realized mine has the sliding plastic door too! I even had to slide it open when I bought the phone. The mind is a terrible thing to waste ...

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Ah? Mine is Intl Galaxy S and there is a sliding door closing the USB port.
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Old January 13th, 2011, 01:50 AM   #50 (permalink)
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Awesome info!! Hope it works for me. Thanks
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The Samsung Galaxy S was announced in March of 2010 was a high-end feature packed phone during its day. This was the start of Samsung's global takeover and although this particular phone saw many iterations and variants here in the state and ov... Read More

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