I've tried everything I can find on the web to repair this sm-n920a. Any time I plug it into a computer it comes up with a usb error.
I've even replaced the charging port, with no luck. It charges fine, doesn't appear to be any damage, tried 5 different usb cords that are working fine with other phones.
The ultimate goal for me is to update it to nougat, but the ota won't push on it from at&t, and obviously I can't force it to update plugged into the computer.
This even happens in download mode.
This happened to a lot of these phones, the ultimate real fix it seems to be replacing the mobo, but would like to know if anyone has any real fix, or a way to work around it to install nougat. I've tried a dozen things to get it to try to push nougat too with no luck.
Since these phones dont even have an sd card I can't even load files onto it unless maybe by bluetooth?
I wonder if I moved nougat over to it by bluetooth could I then get it to install somehow?
I just verified it's definitely something wrong with the phone cause I can insert a usb dongle that I have and a usb drive which comes up fine on my note 4, but doesn't appear on the note 5...although the light on the usb drive turns on, but it just doesnt see it...so there must be something wrong with the drivers on the phone, or something on the phone end...any help would be appreciated.
usb host check shows usb host not enabled on the phone. Can only "fix" it it appears with root, can't root without usb access.....daaaammmnnn
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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...
My dad had installed the gingerbread leak but was complaining about random reboots, so he gave me his phone to bring back to fro-yo, I backed everything up with titanium, and I successfully brought it to ED05, but now the phone does not recognize being connected to USB, and my computer cannot see it connected.
I cannot Odin anymore because computers do not recognize it, I have tried uninstalling the drivers and re installing, but that did nothing. I was hoping at the least that I could root and restore all his apps and data, but I can not do that either, because I cannot use Odin or SuperOneClick, and Z4 or Gingerbreak do not seem to work.
I would appreciate any help, right now i am puzzled. But I guess at last resort, he could switch phones with me, and recover everything on my fascinate.
Did you make sure that the settings are correct, like USB debugging checked, etc. Mine had that issue too until I fixed those.
I had an exact same problem with several computers. Once I replace the USB cable to new one, it works fine. Bring to Verizin store, they will replace it for you.
The samsung phones are very picky about usb cables. Also you will find alot of USB Cables are not "sync" cables, but for charging only. Target sells a USB sync cable for $6 (last i checked). Also, i have heard (but not verified) that if you go to walmart at each cash register on the candy rack there is a cheap usb car charger for $4 that has both micro and mini usb connectors. This charger consistst of a DC car adapter and the usb cable and have heard it will work for sync if you are broke and cant afford a better cable.
Use a different computer.
The same thing happened to me a while back. I installed the drivers on a different computer and used the cable that came stock to put files on the SD card so I could flash a different ROM and that fixed the problem. You can also connect your device to your computer and put the files on your SD card and swap the cards on the two devices. Hope This helps!
About 3 months ago I started noticing the problem. Sometimes windows would recognize the phone, sometimes it wouldn't. When it did, my phone would give me the mount sd card option, and show the usb icon. When it didn't work, it would show nothing. My computer would beep and say the device is not recognized. I would then unplug and try again. After a while it would work.
Then one day, I unplugged the device and have not been able to get it to mount since. I plug the device in, computer beeps and tells me unrecognized device. And there is no change displayed from the phone. No usb connected icon, no mount sd. BUT, it does still charge, the now battery icon changes to the charging icon.
This hasn't been a problem because I can get on LAN over wifi and do what ever I needed to do wireless(AWESOME!) But...alas..tmobile SUCKS. And I'm thinking about switching. Sprint will credit me 130.00 to cover the ETF..HAHAHA. But if I'm going to get as much as I can for this phone on ebay, I need to figure out whats causing this problem.
I have tried 3 computers(all available usb ports) and 3 cables. One of which was brand new.
I am currently running Simply Honey 5. And read online that I need different usb drivers for the newer version of Android. I have found and downloaded these drivers but cannot get them to install. Windows 7 tells me that the current drivers for 'unknown device' are current and up to date when I try to point to the newer drivers.
What should my next step be? Is there a chance the port on my phone went bad? Maybe a pin needs to be pushed up a little?
thanks in advance
Nick
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.