Having a strange problem with my phone atm.
The other day I tried connecting to my PC (Win 7) to try and root my phone, only to find that my computer wouldn't recognize the phone. I've had this problem once before with my old Droid X, and that was due to me accidentally reversing the power lines on a homemade USB Host cable, which ultimately fried the USB port.
I thought maybe something similar had happened, as i've been using another homemade Host cable for charging the phone lately. This cable had never given me problems in the past, but I thought maybe something came lose and shorted. However, using that same cable, I can connect a mouse or a keyboard to my phone no problem, so I know that the USB port is still working. Because of this, i'm under the impression that the phone is maybe stuck in host mode?
I thought it might be the cable I was using, but I just bought a fresh one and it's doing the same thing: I'll hear the Win 7 device connected tone go off twice, but it won't show up with the rest of my drives, and the USB connection icon won't show up in the status bar on the phone, although the phone charges fine.
Tried factory reset, didn't help.
Also tried it on two different computers, and no dice. All the computers have the Motorola Device Manager installed.
Any ideas?
EDIT: ****! Wrong section
EDIT: Dunno if this is "progress", but after cleaning the port out with rubbing alcohol, and reinstalling the motorolla device manager, I now get a "USB device not recognized" error every time I plug the thing in... Mouse still works fine though.
Fixed it, for anybody who actually is reading this.
First, since my phone worked fine as a USB host, I tried taking one of my cables and grounding pin 4 to turn it into a Host cable.
No dice. I noticed a resistor on pin 4 though, which I thought was kinda weird for something that's supposed to be floating.
Then I read up about the whole "motorola factory cable" thing. Took the same cable, undid the Host mod, and then pulled out the resistor. Voila! Problem solved.
I guess the "Universal" in "Universal Serial Bus" was just a joke, right?
Related
Ok.
So at some point I soft bricked my phone and I got the Phone -- ! -- Computer screen.
Managed to get it back into download mode, and then unbricked it by getting it flashed to EB01 as instructed in this thread
http://forum.xda-developers.com/showthread.php?t=1026746
So now I have EB01, which is working, however there is a new problem.
When I try to plug the phone into a computer, it is not recognized (Says the device has malfunctioned).
I have tried 3 different computers. I made sure I used the cable that came with the phone.
I brought it into the Verizon store, and they were unable to get any of their computers to recognize the phone either (we tried a few other cables there as well)
This is both in download mode and within the OS itself.
They told me to try downloading Vcast however that didn't work either.
So now I'm wondering if there is something I can do to get it to recognize it properly again.
Has anyone run into this situation before and managed to fix it?
I did twice have the phone plugged in via usb to my car, and walked out the car (was talking on the phone), and the USB yanked out, so that could have potentially damaged it (though it still charges, so I don't know)
Yanking it out could have very well done it. Only thing I would suggest is reformatting the drivers and attempting again this time leaving it plugged in and rebooting the computer. If that doesn't work, replacement time.
Do you have "usb debugging" turned on?
Did you activate the connection from the phone after connecting to computer? (mine shows a green screen with a button to activate the connection for mass storage)
beyond that... idk.
redownload the samsung drivers
based on the fact that so many PC's have been unable to connect and the info on yanking the USB charger in the car (I think we have all likely done that - though for me it has happened at work with the laptop<->network cable...) you may have damaged the plug/receptor (not sure what would be proper...).
I would do a visual inspection for kicks, though I am sure there could be damage you cannot see.
I believe that these USB connections are a minimum of 4 conductors (some devices are more proprietary and use more pins to ensure you are using an official cable so they can get you to buy more of their stuff - though some of those pins are not actually wired through the cable, but rather short to each other...). If you damaged only one, that could likely be the reason that you can get a charge but no data comm - and since it seems likely that one of the two data pins would be tx and the other rx, then I could see why teh PC would report the device had malfunctioned...
I am guessing here - logic, please don't fail me...
when phone is plugged into PC it will not show a usb connection on the phone it just charges the device the computer also does not see the phone. I have also plugged it into my macbook and nothing happens. Anyone else have this problem or any solutions?
What's your ROM?
when you put the usb in the charging port on the TB, does it feel wiggly or loose to you? It's supposed to be a solid connection. My last TB was loose in the charging port and would do the same thing
usb
try another cable, try taking out the card and putting it in the pc, the data pins might not be establishing a connection
Hey guys after trying everything possible and seeing that my buddys TB connects fine i took it to Verizon and their sending a new one in the mail hopefully that solves everything
I have the same problem, computer will charge but not recognize usb connection nor will phone recognize connection? Have had this problem across multiple roms thinking it was software problem but to no avail. Have tried multiple cables and computers? My connector appears to be in good condition visually , which probably doesn't mean much. Just wondered if anyone could think of another possibility before I lean towards hardware problem?
Had this issue before get a new cable if that doesnt work idk thats all i had to do.
I've tried 4 cables and 3 computers and 3 roms.... Guess It's a hardware problem.
had the same issue and it was hardware and my phone was replaced by Verizon.
Sometimes if you don't plug into the usb 2.0 port, things can get fishy. Usually the 2.0 port is alone opposite of the other usb ports on laptops.
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.
On my TF201, about an hour ago, my USB connection to it just dropped. No loose connections, brand-new cable. I had thought it was just a bug in my USB drivers, so I quickly unplugged/replugged the device. No connection. I rebooted both devices at least 2 times, and still no luck. I figured that I might be able to determine what's wrong by connecting the cord to the wall plug. It charged just fine. after that, I assumed that it was the computer's USB port, so I plugged my phone into the same port. Was able to get adb connected to my phone, no issues. My question is, How could I determine what the issue is, without RMA'ing it or resetting it?
(Also wondering if me connecting a flash drive to the keyboard dock with it showing up for a split second then going away is any indication of anything, I'm just going to assume the worst and say the USB is shot)
I have the same problem bro. I don't know what to do I am be very pissed. I read somewhere on xda a guy had a problem with his epic and took a qtip with alcohol and cleaned the contacts and it worked. I will try this tomorrow and get back to you. I have tried other pc but nothing works and I hate not having root and I add-on considering selling my prime just because of this
Kinda have it working, in the sense that the USB cable, when connected, will make the device show up in Device Manager as an "Unknown Device", but much past that, I'm not sure. I don't have the device near me right now, I will on Monday, but once I can, I will try the alcohol trick, it worked for my phone, and the keyboard dock. (BTW, I did blow into the USB port, and now the devices attached show up for 45 minutes - 1 hour before they disappear, and also, when connecting an SD card into the dock, it shows up, but on the case that the micro SD is not connected in the device (Dunno if it does this normally or what)
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.