My SGS2 keeps disconnecting and reconnecting the usb with my computer. This is hapenning for quite a long time now.
I keep hearing the windows connect/disconnect usb sound when my phone is plugged in, making it unable to recognize the device.
Today, it finally didn't had this problem for a while, so I took my chance to get back to stock ROM (because I need to send my phone to Samsung for camera problems). So I flashed stock ROM with ODIN, but I encoutered a problem: it didn't get further than the boot animation.
When I tried to reflash, ODIN didn't recognize my phone anymore, just like before. When I plug in my SGS2 to my computer while on download mode, it just keeps reconecting the USB, so the device can't be installed.
Tried a different computer. It kept being connected, but that comp sucks and it couldn't recognize my phone at all. My own computer also has problems recognizing the SGS2, but also has the problem that it can't stay connected.
Things to know:
- Other usb devices do stay connected, it's just for my sgs2
- I've tried different USB hubs etc., reinstalling Kies, uninstalling drivers.
- It does keep charging the phone, even when the computer makes the disconnect sound. That makes it even weirder!
Basically I'm seriously out of clues how to revive my phone
I don't want to send it to Samsung, scared of losing warranty.
You guys are my last hope!
to start the ball rolling, YOU SHOULDNT BE connecting sgs2 to a HUB, thats probably the fault, second, have you tried a different usb lead or a different computer with the same lead to either verify if its the phone or lead at fault??
No one on here can answer your question because it sounds like a hardware issue, wire or hub or charger port, but it is an elimination process and only you can do that.
If you try everything and still get no joy, restore your pc to an earlier point, uninstall the samsung drivers and re-install them etc etc.
I very much doubt its a software problem tho, looking at what you tried already, lots of people use hubs, if youre flashing roms and your connected to a hub then ya play a dangerous game and risk soft bricking your phone, most of the time odin wont recognise your phone through a hub, same if ya usb lead is too long, itll charge but no data. always connect it directly to the pc usb 2 port.
gazza35 said:
to start the ball rolling, YOU SHOULDNT BE connecting sgs2 to a HUB, thats probably the fault, second, have you tried a different usb lead or a different computer with the same lead to either verify if its the phone or lead at fault??
No one on here can answer your question because it sounds like a hardware issue, wire or hub or charger port, but it is an elimination process and only you can do that.
If you try everything and still get no joy, restore your pc to an earlier point, uninstall the samsung drivers and re-install them etc etc.
I very much doubt its a software problem tho, looking at what you tried already, lots of people use hubs, if youre flashing roms and your connected to a hub then ya play a dangerous game and risk soft bricking your phone, most of the time odin wont recognise your phone through a hub, same if ya usb lead is too long, itll charge but no data. always connect it directly to the pc usb 2 port.
Click to expand...
Click to collapse
Ow, I think I used the wrong word. I meant to say port instead of hub.. Translation fail there. So that's not the problem, I've put the cable directly into the USB port.
I think you are right about the hardware problem. I'm just not sure where the problem is. I only have one cable, so I can't test that atm. But like I said, the connection problem does NOT occur on another computer. It keeps the device connected (as an unknown device though).
So it's weird: it looks like a SGS2 hardware problem, but on the same time it has a different problem on a different computer. It's really confusing...
Thanks for the quick reply by the way
sebas156 said:
Ow, I think I used the wrong word. I meant to say port instead of hub.. Translation fail there. So that's not the problem, I've put the cable directly into the USB port.
I think you are right about the hardware problem. I'm just not sure where the problem is. I only have one cable, so I can't test that atm. But like I said, the connection problem does NOT occur on another computer. It keeps the device connected (as an unknown device though).
So it's weird: it looks like a SGS2 hardware problem, but on the same time it has a different problem on a different computer. It's really confusing...
Thanks for the quick reply by the way
Click to expand...
Click to collapse
Android Sync manager Wifi is the answer you're looking for ^^
no more plugging in this... mounting that...
NB, has a pc side component
King_Rat said:
Android Sync manager Wifi is the answer you're looking for ^^
no more plugging in this... mounting that...
NB, has a pc side component
Click to expand...
Click to collapse
Then please explain me how I could ever do that when there is no working ROM on my phone. I'm stuck on the 'restore with Kies' screen, like I told in my post (yes, still). And how it will ever work with ODIN? It won't...
Now not any computer is connecting with my sgs2. It just doesn't show anything (not even unknown device). I'm going to try to buy a new cable. Is it needed to buy a Samsung cable? Because it's harder to find than just a regular usb to micro usb cable (and more expensive ). This is my last hope. When it's not working, I need to send it to Samsung.
sebas156 said:
Then please explain me how I could ever do that when there is no working ROM on my phone. I'm stuck on the 'restore with Kies' screen, like I told in my post (yes, still). And how it will ever work with ODIN? It won't...
Now not any computer is connecting with my sgs2. It just doesn't show anything (not even unknown device). I'm going to try to buy a new cable. Is it needed to buy a Samsung cable? Because it's harder to find than just a regular usb to micro usb cable. This is my last hope. When it's not working, I need to send it to Samsung.
Click to expand...
Click to collapse
You need to replace your usb board within your phone. New part can be found on ebay for around $10. It's a really simple task replacing it. No soldering or anything.
It's been well documented on these boards.
Sent from my GT-I9100 using Tapatalk 2
Related
So, I just got a HTC HD2 and am trying to connect it to the PC. By the way, did the TMOUSA HD2 ever come with a cd?
I have a vista and tried to download the Activesync 4.5 but it won't allow as I am suppose to download Windows Mobile Device Center. So, I download WMDC and installed it. I plug in the phone and all I get is "USB Device Not Recognized" . PC doesn't detect it.
I have searched everywhere and tried everything but can't seem to get it going. I haven't anything solid to get it to work.
I tried:
-reinstalling the WMDC
-check and uncheck "Enable faster data sync"
Anybody have any idea? TIA
Is the phone charging LED lighting up when connected?
Have you tried another USB cable and/or another computer?
Then you could boot the phone up in Bootloader Mode. It will say 'serial' at the bottom of the screen. Then plug in the USB cable. The 'serial' should change to 'USB'. Then this might indicate that your computer is viewing the device as a unknown device. This device can be removed and your phone, in normal mode, replugged in.
This may not help, but it's worth a try. Vista has a known issue where it just stops recognising USB devices, even basic ones. Plug your phone in via USB and then restart the computer. When it comes back on it may recognise the phone. If this works then it will be okay for a while at least, but you may have to do this again every now and then.
Vista's basically a bug-ridden bag of gash. If you can, upgrade to Windows 7.
Hope this helps mate.
fred_up said:
Is the phone charging LED lighting up when connected?
Have you tried another USB cable and/or another computer?
Then you could boot the phone up in Bootloader Mode. It will say 'serial' at the bottom of the screen. Then plug in the USB cable. The 'serial' should change to 'USB'. Then this might indicate that your computer is viewing the device as a unknown device. This device can be removed and your phone, in normal mode, replugged in.
Click to expand...
Click to collapse
I tried with a laptop with vista (WMDC) and a laptop with xp (activesync 4.5). The led charging light is on, so it is charging but for some reason device not recognized.
I tried the bootloader (not sure what that does) and it says serial and then I plugged in the usb and it still says serial.
Still not working
johncmolyneux said:
This may not help, but it's worth a try. Vista has a known issue where it just stops recognising USB devices, even basic ones. Plug your phone in via USB and then restart the computer. When it comes back on it may recognise the phone. If this works then it will be okay for a while at least, but you may have to do this again every now and then.
Vista's basically a bug-ridden bag of gash. If you can, upgrade to Windows 7.
Hope this helps mate.
Click to expand...
Click to collapse
I think I tried that already but I'll give it a shot again. At this point, I'll do anything lol. I was so stoked in putting android in this too
does any one think a hard reset might help?
It sounds as though the USB controller in the phone is damaged. I had this problem with my HTC Diamond, and searched for ages trying to find a solution. I manged to flash it with a couple of times with different ROMs (from the internal memory via WiFi) - this did not solve the problem.
I am sure that a power surge from a car charger was the cause of the fault.
bananapants said:
does any one think a hard reset might help?
Click to expand...
Click to collapse
it couldn't hurt. i would - see what happens.
try checking cabling first or change the cable
Same problem
I am having the exact same problem. My phone can charge on the computer but I cant sync of even access it via the "Disk Drive" setting. I have tried both AcrtiveSync and the Disk Drive option, unchecking fast data synchronization, reseting the phone, and reinstalling WMDC. I have Windows 7 with the latest updates. I have also tried connecting it to two other Win7 machine with identical "device not recognized" results. The phone and cable and practically brand new. Any help would be greatly appreciated. I'm at my wits end with this phone and it has been beyond frustrating.
Dom
Try another pc... buddy wid wmdc in it... go for win 7
Sent from my HTC HD2 using XDA App
I am having same problems have tried on a vista pc, my mac and mac running parallels, nothing works. Reckon it is as fred_up says, damaged usb controller which means no NAND Android for me.
Been having similar problems, but seems to have been less likely to occur if I click "Safely remove hardware" in Vista or W7, and remove the device - yes even Activesync (doesn't seem to be available in XP)
Mark
did anybody find a soulution?
hi
did anybody get solution for this? i m having the same problem.
phone doesnt sync with wmdc, nor connect as disk, only charges itself.
message appears "usb device not recognised"
i have done everything, changed cables, pcs, re installed wmdc, even flashed new roms using micro sd....nothing happened.
is this a hardware issue? why can it be charged but not synchronised?
pls help anybody.
Try another Cable. In my case, changing the cable works. Now i m using my HD mini cable with HD2 and it is working well.
krishan2207 said:
Try another Cable. In my case, changing the cable works. Now i m using my HD mini cable with HD2 and it is working well.
Click to expand...
Click to collapse
thanks,
but i have already tried all that.
today i called a phone repair shop and they told me that
this could be due to two reasons.
1. usb port problem.-in which case it is replaceable for about 15 usd.
2. problem with an IC (?) of the circuit (guess the motherboard) - in which case
it is either not repairable or very expensive.
i ll keep posting as i go and visit the shop.
if there's another solution pls share here.
Some possible solutions to non-USB
Having come here via a search, I'll resurrect the thread with a brief comment. I'm having the same problem, haven't tried them yet but found several promising suggestions:
http://www.tipandtrick.net/windows-...drop-and-not-sync-with-vista-wmdc-activesync/
HTH
solution...
oops...had forgotten all about this thread, until today till i received the notice about new reply.
thanks for resurrecting the thread.
actually i went to that phone repair shop i mentioned earlier and they fixed it by replacing the usb port. still it didnt work with win 7 laptops. but was fine with xp laptops. dont know why...anyway i have said good bye to my hd2 long ago & using android now
guess lots of people are.
good luck to you all.
My problem is that I cannot connect my Galaxy S II to computer. When I try to connect it only says "unknown device". I have tried with newest Kies and without Kies. With multiple computers with Vista and Windows 7 32bit. Also downloaded Samsung Galaxy S drivers manually from web but with no avail. And I have tried with Usb-debugging on and without it. I also tested USB-mass storage setting but it does nothing. Computer also says "unknown device" when I try to connect phone while in download mode.
The charging works btw.
When I connect the cable my phone just makes the normal sound but the mass storage android man newer appears to top tray. I have also made factory reset and cache delete from recovery but with no luck.
I would like to flash different rom with Odin but I cannot do that when the connection is not working. My current rom is official XXLPQ ics. The usb cable isn't the problem because I have tried with different cables which work normally with other phones.
Is the warranty repair only solution? Really wouldn't want to be without my Galaxy during the repair time.
Sounds like it's going to need a check over, if it wasn't for the fact you have tried multiple computers AND leads, as I had a similar problem but found it was down to my PC needing a fresh install.
Unless others with similar experiences have advice it doesn't sound good, as though pins 2, 3, or 4 have problems maybe, or that the board within the phone has bent up or down through rough handling/tug on the cable.
When did it start happening? I had a fright by tripping over the phone while plugged in, and ripped the plug out while launching the phone across the room. It broke the charger and thought I'd killed the port on the phone, but found if I propped the plug up and put weight on the phone it would connect, like this...
hxxp://i.imgur.com/y1bPj.jpg
Might work if the board has got a whack like mine did.
Sub Atomic Specialist said:
Sounds like it's going to need a check over, if it wasn't for the fact you have tried multiple computers AND leads, as I had a similar problem but found it was down to my PC needing a fresh install.
Unless others with similar experiences have advice it doesn't sound good, as though pins 2, 3, or 4 have problems maybe, or that the board within the phone has bent up or down through rough handling/tug on the cable.
When did it start happening? I had a fright by tripping over the phone while plugged in, and ripped the plug out while launching the phone across the room. It broke the charger and thought I'd killed the port on the phone, but found if I propped the plug up and put weight on the phone it would connect, like this...
hxxp://i.imgur.com/y1bPj.jpg
Might work if the board has got a whack like mine did.
Click to expand...
Click to collapse
I received it like this. Only 4 months old though. I tried to bent the cable plug slightly when connected to computer but it didn't help.
check wiv diff cable..
install phone drivers in kies...
check usb port on phone and pc ,if any debris then clean...
android on tray -drag down and c if u can connect as storage...
rocky23 said:
check wiv diff cable..
install phone drivers in kies...
check usb port on phone and pc ,if any debris then clean...
android on tray -drag down and c if u can connect as storage...
Click to expand...
Click to collapse
As I mentioned earlier I have tried all that.
First, i apologize if there is already a thread regarding this, but everything ive came across searching on google/xda has come to no avail.
i just got the i777, plugged it into my computer and nothing happens. on my phone it says "mtd connected" and charges.
ive turned on usb debugging, installed samsung kies, installed the drivers, tried the "dial *#7248#(or whatever it is), ive tried 3 different usb cables, all the usb ports on my laptop (brand new alienware), and also 2 other laptops. nothing works
my computer also makes the sound that its been connected. if i go into device manager it shows as Other devices > 7 CDC's with the yellow exclamation mark
if someone .could PLEASE help me it would be much obliged, all i want to do is start flashing again
chuckles_prs said:
First, i apologize if there is already a thread regarding this, but everything ive came across searching on google/xda has come to no avail.
i just got the i777, plugged it into my computer and nothing happens. on my phone it says "mtd connected" and charges.
ive turned on usb debugging, installed samsung kies, installed the drivers, tried the "dial *#7248#(or whatever it is), ive tried 3 different usb cables, all the usb ports on my laptop (brand new alienware), and also 2 other laptops. nothing works
my computer also makes the sound that its been connected. if i go into device manager it shows as Other devices > 7 CDC's with the yellow exclamation mark
if someone .could PLEASE help me it would be much obliged, all i want to do is start flashing again
Click to expand...
Click to collapse
Probably a bad usb connector on your phone. What rom are you currently on?
I was fearing this. Its all stock, not even rooted.
IF i have to get a new usb port, do i have to do any soldering?
When I had this problem I downloaded multiple different drivers and eventually found ones that worked . Try Google searching i777 usb drivers. I downloaded ones that worked from softpedia actually.
chuckles_prs said:
I was fearing this. Its all stock, not even rooted.
IF i have to get a new usb port, do i have to do any soldering?
Click to expand...
Click to collapse
No soldering required. It's just a ribbon cable that connects to the main chip. Took me about an hour from start to finish, but i was being really careful.
Sent from my SGH-I777
He has said his computer recognizes the device, albeit it sees it as an unknown device. And it makes a sound when plugging it in. This tells me it's not a usb port problem but a driver problem. I have had this same problem. As I stated above. Even after installing kies it still didn't recognize it. I had to install the android sdk package, open the program and update, and then it still wouldn't recognize it. I had to download separate usb drivers for the phone as well. Who knows why, some computers or operating systems just have a harder time with the drivers. That's the problem in my opinion. Here's hoping it's not a usb port problem. Also this would prevent charging if it were a faulty usb port on the phone wouldn't it?
Phalanx7621 said:
He has said his computer recognizes the device, albeit it sees it as an unknown device. And it makes a sound when plugging it in. This tells me it's not a usb port problem but a driver problem. I have had this same problem. As I stated above. Even after installing kies it still didn't recognize it. I had to install the android sdk package, open the program and update, and then it still wouldn't recognize it. I had to download separate usb drivers for the phone as well. Who knows why, some computers or operating systems just have a harder time with the drivers. That's the problem in my opinion. Here's hoping it's not a usb port problem. Also this would prevent charging if it were a faulty usb port on the phone wouldn't it?
Click to expand...
Click to collapse
I wonder if the OP tried this on a computer with Windows XP. I've noticed Vista and 7 seem to have a hard time discovering/installing some usb devices. As for it not charging also..I think the pins inside the port are used separately for charging and connecting to pc.
My computer recognized my phone fine back when it was the Captivate, but it has a really hard time with my GS2. It often will say "invalid hardware id" or not show up at all. Usually it's fixed by swapping ports.
I can't get my phone detected via usb from any device or computer. Weather in android, recovery or bootloader. The phone still charges fine however. The phone also will think there is a USB cable plugged into it when there isn't.
I don't know what to do to fix this, or if its even fixable. I've tried four computers and 3 different cables, along with removing and installing the drivers multiple times. Changing roms/kernels doesn't fix it, obviously its an issue beyond that since fastboot won't detect USB either.
Any help would be appreciated!
Get some canned air and blow it into the slot for a while. It sounds like there may be something conductive stuck in there. Maybe get a magnifying glass and look in there to see if you can see anything.
Tried blowing with compressed air and got my eyes all up inside there and nothing
Any luck with this issue? I'm experiencing the same problem
sounds like a piece got loose inside the phone and only the power parts of the usb slot are still attached which is weird im guessing just hardware failure.
Davyath said:
I can't get my phone detected via usb from any device or computer. Weather in android, recovery or bootloader. The phone still charges fine however. The phone also will think there is a USB cable plugged into it when there isn't.
I don't know what to do to fix this, or if its even fixable. I've tried four computers and 3 different cables, along with removing and installing the drivers multiple times. Changing roms/kernels doesn't fix it, obviously its an issue beyond that since fastboot won't detect USB either.
Any help would be appreciated!
Click to expand...
Click to collapse
Is the phone showing up in device manager on the computer?
RLGL said:
Is the phone showing up in device manager on the computer?
Click to expand...
Click to collapse
No it's not..
Yeah that sound like hardware issue for sure.
Sent from my DROID DNA
Damn, was hoping i bricked the USB like I've read about the HTC Desire, was hoping to somehow reload/reinstall the driver.. I guess off to HTC to see what they can do.
Hey There.
So i got a small problem. When i connect my phone to my computer with a misro usb (not 3.0) it doesnt recognize the phone at all. Normally on the phone it will show its in Camera or MTP mode oin the pull down menu but now its not showing anything but it does charge the phone. Did i hit a setting somewhere i didnt realize?
Any help is much appreciated.Been on the site quite a few times just reading the wealth of knowledge. First time ive had an issue where the answer isnt already posted here lol.
Thanks
But you're saying it does work with the original Samsung 3.0 USB cable? Then that would mean the phone doesn't like the other cord for some reason. Samsungs can be picky like that sometimes. Check the Device Manager for driver errors and try other ports, cords, and computers to make sure it's not a new issue with the phone's USB charge port.