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[Q] Phone doesn't connect to my PC

I posted this on a forum that I thought it applied to but the one answer I got did not work, I've done searches everywhere and have not seen a solution. There were a couple of similar problems for other phones but these fixes did not work for the infuse, so . . .
I Bought the infuse on day one. Installed Kies 2.0.0.11044_11_3. Phone not recognized, installed drivers, researched and learned the truth about Kies. Phone would not be recognized but at least installing Kies made the phone visible to the PC, so I knew I could root if I so desired, read up about rooting looked over the forums, learned my phone and finally thought I was ready. The phone had other plans.
Decided the other day that I was ready to root. Plugged in the phone but it no longer showed up in my PC running Windows 7 64 bit. Something about the phones compatibility with my system changed. Tried to install a newer version of Kies 2.2.1.11053_99_3 yesterday for the drivers, reinstalled drivers, activated USB debugging, plugged the phone in started up SuperOneClick and . . . still nothing happened. So I deactivated USB debugging and started over. Followed all the directions in the root posts and and SuperOneClick threads . . .
But somehow between day one and today my Windows 7 64 bit system does not know that the phone is plugged into it.
When I plug the phone into USB the phone asks me how I want to interact with the computer, Kies (Firmware Update); Media player: Mass storage. But the computer shows nothing. Device Manager doesn't list the phone, Windows Explorer doesn't show the phone, Devices and Printers window shows everything that's connected but NOT the phone, it's as if I plugged nothing into the computer. These places don't even show unknown device. The phone is charging so I know that it's plugged in, but it doesn't seem to be communicating with the PC. I've re-booted, re-installed, reviewed, rewired and re-alized that I have no clue what happened. (Tried different cables, different USB ports different times of the day)
It worked once upon a time, I tried rolling back restore points and disabling my kaspersky 2011, I've followed all rooting instructions in these threads to no avail.
Thinking about restoring phone to factory settings as a last resort. Got this reply in another thread (sorry about posting multiple threads, but I'm at wit's end.):
Try removing all instances of the Infuse coming in contact with your system using USBDeView. Also, how does it look in Disk Management? (Start button > search for "Computer Management" > Storage > Disk Management) Does the Infuse show up there as removable storage?
My answer: Tried it, didn't work, oh wait, didn't run USBDeView as administrator, re-tried as administrator and uninstalled all instances of Samsung i-997, then tried to plug the phone back in and still nothing.
Also not in Computer Management or Device manager either. Is there a way to uninstall any drivers that I have and then re-install them?
I did a factory reset, plugged the phone in and still nothing. Had to spend two days re-installing apps and re-configuring launchers . . .
I am now ready to hurl my phone out into traffic to see if that will help, but before I do I'm hoping someone here may have the answer I need.
. . . please . . .

If you are trying to root super one click will work. It worked on my infuse. First see if you can connect using mass storage. If you can access the files on your phone you are good. On win 7 64 bit it should just pop up to view the files. After that unmount and unplug the cable. Enable USB debugging and reconnect. Run super one click and it should work. Not every time does super one click work on the first run. I believe I had to unplug and reconnect a second time for it to work. But I did use super one click to root my phone. I was also using the drivers for the captivate at the time. If you need more help let me know.
Sent from my SAMSUNG-SGH-I997 using XDA App

FYI, drivers are NOT needed for USB mass storage, just to be clear.

Thanks for the reply, but that didn't work. I tried it exactly as you stated but it didn't "pop up" I ran SOC anyway and it got hung up "Waiting for device..." And a dos prompt window opened and just hung there.
SuperOneClick v1.9.5.0
Checking drivers...
Killing ADB Server...
OK
Starting ADB Server...
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
OK
Waiting for device...
When I closed the Dos Prompt window it asked me if I was running OS 2.0 or higher. Wether I click yes or no I get this message:
OK
Getting OS Version...
Pushing psneuter...
error: device not found
FAILED
Thanks for the try, but still At wit's end . . .

it mattters
at least for me (win7 64bit) mass storage mode DOES require drivers. Or else PC just tries to load both SD cards as external drives. I had a hell of a time getting my laptop to recognize the phone. What worked for me was I ended up installing both kies and kies mini. when neither of those worked i tried the Samsung pcl connect and that didnt work. There was a link on the ATT site for usb drivers for it. A combination of both the samsung pc connect drivers and the ATT USB driver works for me. Must be something to do with win7 recognizing it as an MP3 player when in music mode and a EXT drive when is mass storage.

socialal said:
at least for me (win7 64bit) mass storage mode DOES require drivers. Or else PC just tries to load both SD cards as external drives. I had a hell of a time getting my laptop to recognize the phone. What worked for me was I ended up installing both kies and kies mini. when neither of those worked i tried the Samsung pcl connect and that didnt work. There was a link on the ATT site for usb drivers for it. A combination of both the samsung pc connect drivers and the ATT USB driver works for me. Must be something to do with win7 recognizing it as an MP3 player when in music mode and a EXT drive when is mass storage.
Click to expand...
Click to collapse
You just contradicted yourself there. The phone's SD cards appearing as external drives IS mass storage mode. Mass storage mode does not require drivers.
Appearing as an MP3 player uses the MTP protocol, which is NOT Mass Storage mode, which is why it does require drivers.
ADB also requires drivers.

http://www.samsung.com/us/support/downloads/SGH-I997ZKAATT

Thanks, but same problem. After installing these drivers, the phone just doesn't show when plugged in. The next thing is to find a Samsung store (or AT&T store) and see if there's something wrong with the phone's usb port.

Definitely one advantage of picking your phone up at a store... if possible.
My CSR played with the phone on the computer for 10 min., said he was transferring sim contacts.
Sent from my SAMSUNG-SGH-I997 using XDA Premium App

i am having same problems
for the past year i have had a captivate and i have flashed it probably with every rom made by every developer here. i have flashed kernals modems you name it i have done it the phone was incredible i never had one problem till i got the infuse when i first got the phone i rooted it and had a lot of problems but after 5 or 6 hrs i finally was successful. i then could not get the phone to connect to my win 7 pc i then took out the mem card and put my roms on that then transfer them to my phone flash ect but to this day i can not get the pc to transfer files through usb. when i hook the phone up the drives show up but are faint then i connect usb on phone the drives become bold but when i try to transfer files or open drive in explorer the computer lags and the green bar slowly goes across the bar get to the almost end and locks up. my main concern is that there might be something wrong with the phone. at this point i cant even odin it back to factory. from what i have read it is more of a common problem than just one or two people. please help?
ps just flashed maxq-kk2-b10 and it rocks !!

Yeah I have all of the same problems. It must be this phone just has crap drivers.
Sometimes I get the PC to recognize the phone once. Then if I disconnect the phone for some reason then reconnect it is no longer recognized. I need to reboot the computer to get it to be recognized.
I have just come to the conclusion that Samsung's PC drivers are total rubbish for this phone.

Hi!
I have the same problem. I tried connect my infuse to 5 differend PC, with different cables, different OS, but still NOTHING. PC just didn`t know that phone is connected. As a result I can`t reflash it with ODIN or CWM, because for install CWM I need make root first, but Superoneclick didn`t see the phone also.
There is some way to make root on this phone WITHOUT connection to PC ?

try getting a new data cable, the charging part of the cable may still work but the data transfer part may have stopped working-(happened with my dads Atrix 4G after buying a new data cable for $6 at walmart the computer once again recognized it)
so go to your store of preference that sells electronic cables
buy a new data/charging cable-***MAKE SURE IT SAYS SOMETHING ABOUT DATA TRANSFER OR FILE TRANSFER!!!***
shouldn't cost more than $10 depending where you go-like i said my dad got one for $6 and his phone uses the same cable as my infuse...i think all smart phones use the same cable actually.

mg2195 said:
try getting a new data cable, the charging part of the cable may still work but the data transfer part may have stopped working-(happened with my dads Atrix 4G after buying a new data cable for $6 at walmart the computer once again recognized it)
so go to your store of preference that sells electronic cables
buy a new data/charging cable-***MAKE SURE IT SAYS SOMETHING ABOUT DATA TRANSFER OR FILE TRANSFER!!!***
shouldn't cost more than $10 depending where you go-like i said my dad got one for $6 and his phone uses the same cable as my infuse...i think all smart phones use the same cable actually.
Click to expand...
Click to collapse
This is 100% not data cable problem. not driver problem and not PC problem.
I am sure, because I have 2 Infuse and one of them work fine with the same stuff. This is something wrong with the phone hardware or software.
How can I root INFUSE without PC? There is some *.apk or scripts ?

[Q] Unable to connect my Samsung Omnia W GT - I8350 (aka Focus Flash) to PC/Zune

hi,
I am an advance user and recently brought the Samsung Omnia W i8350 a.k.a Samsung Focus Flash. Initially it connected fine and updated twice with zune since the initial stock version.
I did not had time to explore much and I am pretty new to the Windows Phone 7 environment. few days back when I connected the phone to the PC, the device was recognized as GT-I8350 and windows kept on searching for drivers but no drivers were located. I tried installing the zune drivers but even they do not allow me to connect the device to zune (hence no music, no updates, no backups )
Then I downloaded drivers from tsar3000 and they automatically instal 3 devices off my phone, one was a com port, one was modem , and so on...
STILL NO CONNECTION TO ZUNE.
I have tried almost everything but to no avail. can you guys help me?...
Regards
PS: between the last successful connect and unsuccessful connect, there was a time when Win7 stopped booting, so I simply stopped many services and booted again because I had a presentation and no time for a fresh install, could this possibly be a service issue?... I tried starting some services but the did not work. Can anyone enumerate the services required by winP7.5?... also if a manual driver is available, it will be appreciated.
PPS: I also tried running the windows phone 7 drivers from zune folder, it gives an error the device cannot start.

You put the phone in tethering mode, it sounds like. The COM port and modem drivers indicate that the phone is sending a different USB device ID than normal. On the gen1 Samsung phones (and quite possibly on the gen2 ones, but I havne't checked) you could put the phone's USB port in a mode where it would act as a modem for the PC. It sounds like that's what you've done.
Try a search on "WP7 Samsung tethering" or similar and see if you can put the phone back in its normal mode.

GoodDayToDie said:
You put the phone in tethering mode, it sounds like. The COM port and modem drivers indicate that the phone is sending a different USB device ID than normal. On the gen1 Samsung phones (and quite possibly on the gen2 ones, but I havne't checked) you could put the phone's USB port in a mode where it would act as a modem for the PC. It sounds like that's what you've done.
Try a search on "WP7 Samsung tethering" or similar and see if you can put the phone back in its normal mode.
Click to expand...
Click to collapse
hey thanks,
I was just reminded, that I was one day testing the steps mentioned on this thread, to use the phone as USB modem, hence had left it there since then, Never used it though.
Great! Solved!

[Q] Trouble connecting Nexus 5 to new laptop in MTP mode

Not sure how many would read such a long post for a question, but here goes...
Any help is appreciated!!
1. Problem
In short, I plugged in my Nexus 5 to my laptop in MTP mode, it does not show up in "My Computer".
I just wanted to transfer files to my phone via USB, not even using ADB yet.
I have yet to solve the problem after googling around for a bit.
Relevant XDA threads that I remember reading are this, this, this, this and this.
I have tried numerous combinations of (un)plugging my phone / (un)installing drivers / rebooting my laptop and phone / switching usb ports / turning USB debugging on and off / connect in PTP mode / ...
As a workaround, I am now transferring files using the AirDroid app, which is really convenient with acceptable speed.
Still, it would be nice to know why the problem occurred and see if others have similar problem.
Below I will describe the devices I have on hand and more details on the failures I have encountered will follow.
2. My Devices
A. an old Galaxy Note
B. the new Nexus 5 with the stock micro USB cord
C. new laptop
- 64-bit Windows 8 Pro (not upgraded to 8.1 yet)
- only USB 3.0 ports
D. old laptop
- 32-bit Windows XP Home
- only USB 2.0 ports
3. Details
Scenario A. Nexus 5 not showing up in "My Computer"
Naturally, the first thing I tried is to simply plug my Nexus 5 in to my new laptop. I was used to Android devices working just like that!
However, my Nexus 5 does not show up in "My Computer" after a loooong wait.
On a closer look, my Nexus 5 (only) appears in the "Device Manager" under "Portable Devices" as "MTP USB Device".
It shows my device to be "working properly". However, I cannot uninstall/disable it when my phone is plugged in (normal?)
Frustrated, I decided to unplug my phone. I have the option to "Unplug Nexus 5" under "Safely Remove Hardware", but the operation always times out, so I simply unplugged it.
Then I tried with my Note using the same cable. It works flawlessly either in MTP mode or Mass Storage mode.
Scenario B. Nexus 5 shows up, but is really sloooooooooooooow
At some point, I turned on USB debugging.
With USB debugging on, my phone appears under "Portable Devices" as "Nexus 5" (and in some other places according to what drivers I have installed).
I was quite pleased for a few seconds as my Nexus 5 now shows up in "My Computer"!
However, it took a few minutes to list the folders I have under my phone's internal storage.
Attempting to copy a 12MB file to it gives an estimated time of over 2 hours.
Scenario C. Success?
After tinkering with it for some time to no avail, I was beginning to worry if I have gotten a defective hardware.
Then I remembered I had an old laptop stashed somewhere, so I tried connecting my Nexus 5 to that.
And... voila! It works without a hitch (MTP mode, USB debugging off).
A maybe useful note is that I have used both the old and new laptops to transfer files to my Note before.
4. Possible causes
While many seems to have solved the issue by simply unplugging and letting Windows reinstall the drivers, I have no such luck.
I sincerely hope that it is not due to any hardware defects since
a) my Note can talk to my new laptop through the same micro USB with no problems, and
b) my Nexus 5 can talk to my old laptop.
I feel that this is a driver-related issue but I am not sure.
Is it possible that there are compatibility issues with using USB 3.0 port (which should be backward compatible...) or a 64-bit Win 8 Pro?
Any help is appreciated!

It is so strange..
I just bought a USB 2.0 hub and connected my phone to my new laptop through it.
Guess what... it works perfectly!
Apparently my problem was that my new laptop only had USB 3.0 ports for me to test on?
Doesn't make sense... thought 3.0 is backward compatible and my old Note works on it!
Maybe I'm missing something but I'm happy it is solved for me now

This solution worked for me. Go to http://forum.xda-developers.com/showthread.php?t=2512549 and see post #5. Be sure to thank n7of9 for the link and WugFresh for his toolkit solution. Enjoy.

Hey,
I basically seem to have the same problem as you do.
My laptop also only has USB 3.0 ports and Windows 8.1 Pro 64-bit installed.
The Nexus 5 doesn't get installed, in MTP mode it is just shown with the yellow exclamation mark in Device Manager. Downloading different USB drivers including Google's and trying to manually install it doesn't work at all. I specifically checked that all older similar drivers are gone, so I doubt that older Android devices could be interfering.
On the other hand, as you noted, using an older computer with USB 2.0 works perfectly, I had the same result.
To be honest, I'm not much of a developer or Android tinkerer, so I'm not really making any progreess... In the end, I think I will follow your example and test it with a USB 2.0 adapter.
Did you manage to get it to work without this workaround?
Kind regards! :fingers-crossed:

I'm using Linux Mint. Just plug the Nexus in. It shows up as a folder. No hassle
Sent from my Nexus 5

SabinSnorlax said:
Hey,
I basically seem to have the same problem as you do.
My laptop also only has USB 3.0 ports and Windows 8.1 Pro 64-bit installed.
The Nexus 5 doesn't get installed, in MTP mode it is just shown with the yellow exclamation mark in Device Manager. Downloading different USB drivers including Google's and trying to manually install it doesn't work at all. I specifically checked that all older similar drivers are gone, so I doubt that older Android devices could be interfering.
On the other hand, as you noted, using an older computer with USB 2.0 works perfectly, I had the same result.
To be honest, I'm not much of a developer or Android tinkerer, so I'm not really making any progreess... In the end, I think I will follow your example and test it with a USB 2.0 adapter.
Did you manage to get it to work without this workaround?
Kind regards! :fingers-crossed:
Click to expand...
Click to collapse
I had a lot of issues with my S3 and my work computer (windows XP SP3) and it was because I had half installed some USB driver that windows tried installing.
I fixed the problem in device manager by manually uninstalling EVERY SINGLE USB DEVICE attached to the computer while I had my phone plugged in.
Word of caution: You'll probably uninstall your mouse/keyboard doing this.
Once everything was uninstalled I reinstalled the Samsung drivers and it worked fine.
The same computer only required me to install the Google drivers for my N5. If I enable USB debugging, I all of a sudden can't install MTP drivers, but USB debugging disabled works fine.

USB & MTP mode
I have the same problem with my Nexus 5. The only workaround to transfer files to my phone from a computer via USB cable is to enable USB debuging, set the phone to PTP mode instead of MTP and then it shows in My Computer as a camera. I can only access the DCIM and Pictures folders but for now I have to settle for this...I copy all the files I need to let's say Pictures and then using a file explorer (on the phone) I cut and paste them to the folders I wish...e.g. movies to Movies, music to Music and so on...

I had same problem. Developer Mode...USB Debugging ON worked.

I have this problem too, but I got it to work using a galaxy s3 cable. for some reasons the cable that came with N5 did not work.

Its usually just missing drivers.. You can get them straight from Google or a toolkit as mentioned! (P.s you need to download a little applet like thing from Google if you want to hook up your Mac to your n5)
See andoid.com/filetransfer for the drivers.

This worked for me when all else failed: http://forum.xda-developers.com/showpost.php?p=35854664&postcount=7
Hope that helps!

The problem I am having now connecting is that my phone got wet recently. I dried it immediately and used dessicant to withrow the water and now it works (sort of). Now when I plug my phone into my pc, the usb debugging icon doesn't even show up.
I tried connecting to both my work pc and home laptop and they both say the same thing, that the usb device has malfunstioned and that windows doesn't recognize it.
Is it time for a new phone?

islandboy_2000 said:
The problem I am having now connecting is that my phone got wet recently. I dried it immediately and used dessicant to withrow the water and now it works (sort of). Now when I plug my phone into my pc, the usb debugging icon doesn't even show up.
I tried connecting to both my work pc and home laptop and they both say the same thing, that the usb device has malfunstioned and that windows doesn't recognize it.
Is it time for a new phone?
Click to expand...
Click to collapse
Sounds like the usb is shorting. How long did you let it dry. Give it more time and try it again.

jd1639 said:
Sounds like the usb is shorting. How long did you let it dry. Give it more time and try it again.
Click to expand...
Click to collapse
Yeah maybe thats what happened. It's been drying now for about a week. The screen was the major problem at first but has since dried there mostly.
Hopefully it will come back. Would suck to have to buy a new phone because of that.
Thanks. :good:

MTP connecting problem solved
Going back to the subject of the thread: I am pretty sure that ADB drivers and SDK (I am confident that a lot of nexus users have their devices rooted and that means they must have the above installed) is what is causing some sort of conflict when trying to connect the Nexus 5 as MTP. After I reinstalled the windows (W8) on my computer and connected my Nexus 5 it took @1-2 minutes to auto install the drivers and then worked fine...I have no ideea what happens if I install ADB and SDK again...

ASepi said:
Going back to the subject of the thread: I am pretty sure that ADB drivers and SDK (I am confident that a lot of nexus users have their devices rooted and that means they must have the above installed) is what is causing some sort of conflict when trying to connect the Nexus 5 as MTP. After I reinstalled the windows (W8) on my computer and connected my Nexus 5 it took @1-2 minutes to auto install the drivers and then worked fine...I have no ideea what happens if I install ADB and SDK again...
Click to expand...
Click to collapse
If you tell the SDK not to install the drivers it'll be fine

The simplest and shortest way to connect google nexus5 with PC as MTP(Media device)
When I plugged it, there wasn't any yellow exclamation mark within Device Manager. So for me, the drivers were OK. But the device was not listed within my Eclipse DDMS. After a little bit of searching, it was just an option to change in the device settings. By default, the Nexus 5 USB computer connection is in MTP mode (Media Device).
What you have to do is:
Unplug the device from the computer
Go to Settings -> Storage.
In the ActionBar, click the option menu and choose "USB computer connection".
Then select Media device(MTP) or Camera(PTP) based on your requirement...
Plug the device and you should have a popup on the device allowing you to accept the computer's incoming connection..
I hope this will help!
njoy

Resolved. nexus 5 PC Connectivity
hackdisk said:
Not sure how many would read such a long post for a question, but here goes...
Any help is appreciated!!
1. Problem
In short, I plugged in my Nexus 5 to my laptop in MTP mode, it does not show up in "My Computer".
I just wanted to transfer files to my phone via USB, not even using ADB yet.
I have yet to solve the problem after googling around for a bit.
Relevant XDA threads that I remember reading are this, this, this, this and this.
I have tried numerous combinations of (un)plugging my phone / (un)installing drivers / rebooting my laptop and phone / switching usb ports / turning USB debugging on and off / connect in PTP mode / ...
As a workaround, I am now transferring files using the AirDroid app, which is really convenient with acceptable speed.
Still, it would be nice to know why the problem occurred and see if others have similar problem.
Below I will describe the devices I have on hand and more details on the failures I have encountered will follow.
2. My Devices
A. an old Galaxy Note
B. the new Nexus 5 with the stock micro USB cord
C. new laptop
- 64-bit Windows 8 Pro (not upgraded to 8.1 yet)
- only USB 3.0 ports
D. old laptop
- 32-bit Windows XP Home
- only USB 2.0 ports
3. Details
Scenario A. Nexus 5 not showing up in "My Computer"
Naturally, the first thing I tried is to simply plug my Nexus 5 in to my new laptop. I was used to Android devices working just like that!
However, my Nexus 5 does not show up in "My Computer" after a loooong wait.
On a closer look, my Nexus 5 (only) appears in the "Device Manager" under "Portable Devices" as "MTP USB Device".
It shows my device to be "working properly". However, I cannot uninstall/disable it when my phone is plugged in (normal?)
Frustrated, I decided to unplug my phone. I have the option to "Unplug Nexus 5" under "Safely Remove Hardware", but the operation always times out, so I simply unplugged it.
Then I tried with my Note using the same cable. It works flawlessly either in MTP mode or Mass Storage mode.
Scenario B. Nexus 5 shows up, but is really sloooooooooooooow
At some point, I turned on USB debugging.
With USB debugging on, my phone appears under "Portable Devices" as "Nexus 5" (and in some other places according to what drivers I have installed).
I was quite pleased for a few seconds as my Nexus 5 now shows up in "My Computer"!
However, it took a few minutes to list the folders I have under my phone's internal storage.
Attempting to copy a 12MB file to it gives an estimated time of over 2 hours.
Scenario C. Success?
After tinkering with it for some time to no avail, I was beginning to worry if I have gotten a defective hardware.
Then I remembered I had an old laptop stashed somewhere, so I tried connecting my Nexus 5 to that.
And... voila! It works without a hitch (MTP mode, USB debugging off).
A maybe useful note is that I have used both the old and new laptops to transfer files to my Note before.
4. Possible causes
While many seems to have solved the issue by simply unplugging and letting Windows reinstall the drivers, I have no such luck.
I sincerely hope that it is not due to any hardware defects since
a) my Note can talk to my new laptop through the same micro USB with no problems, and
b) my Nexus 5 can talk to my old laptop.
I feel that this is a driver-related issue but I am not sure.
Is it possible that there are compatibility issues with using USB 3.0 port (which should be backward compatible...) or a 64-bit Win 8 Pro?
Any help is appreciated!
Click to expand...
Click to collapse
Hello !!!
I faced the same problem with mine...
Couldn't connect my phone with my laptop.
It installs the driver but not displaying the folder in my computer.
I uninstalled the Existing samsung driver in control panel.
Then the issue has been solved,
Or uninstall previous mobile's drivers
Try this!?!

Search for Universal Driver here in XDA. Had the same problem most of you are having. First try and BAM! Works like a champ...
NEXUS 5

Problem solved for me
I have no more issues what-so-ever after I unninstalled ADB & SKD drivers...Windows(8) installed my phone by itself after a restart and it works as it should in MTP mode and PTP mode.

[Q] Nexus 5 not connecting to computer (usb), does not show in device manager

Hi,
I would like to see if I can get anyones assistance with solving my problem. I have lost the ability to connect my Nexus 5 to my computer via USB. I had previously been able to connect the phone without any problems.
Connecting my phone to PC charges the phone but no drivers are loaded, nothing changes in device manager and I cannot see a change in windows explorer to view the memory card.
So far I have tried the following:
searches on various sites
rebooting phone, starting in safe mode, wiping all data, performing a hard reset
connecting other phones to usb cable to check that it is not a charge only cable, also trying several other USB cables
connecting phone to other computers
connecting other phones (HTC) to load drivers (then uninstalling drivers)
displaying all hidden devices in device manager and removing all drivers that resemble something to do with mobile phones
uninstalling programs I no longer require on the PC
using "wugs nexus root toolkit" to uninstall and re-install drivers
checking & unchecking MTP, PTP, developer options, USB debugging in various combinations to elicit a response from the computer.
I have also tried to visually check the connections of the USB port on the phone wondering is there is a break but I cannot see very well.
does anyone have any further suggestions to get this phone connected to a PC?
my only last thought is to attempt to open the phone and check the resistance of the plug connections.

Have you tried enabling and disabling usb debugging while plugged in?
Sent from my Nexus 5 using Tapatalk

I just did it, no change in Device manager or explorer

tropicalchills said:
I just did it, no change in Device manager or explorer
Click to expand...
Click to collapse
Are you sure you're using a data usb cable and the usb port is good?

Same Issue
same thing happened to me today when i connected the device to PC.
Mine says unknown device on PC under other devices. so i hope my USB port is ok.but im not using the original SUB cable. i wonder that's is the issue. but it didn't bother me until today. my original cable is at my friend's house.
Tried updating drivers manually. But following error message occurs once i select the drivers folder and hit ok.
Windows was unable to install your unknown device
Please help.

so, not really a solution but while at work my phone fell on to a nice rock cracking the screen. I have replaced the phone and the new phone connects to the pc fine, drivers come up without a problem (I will put this down to a fault with the phone)
Thank you for your assistance

Nexus 5 problem connecting to PC with USB

I've had this problem before, but I have always been able to fix it by uninstalling ADB and drivers, through WUG's toolkit, changing cables, device manager/update drivers, jumping up and down while spinning and plugging cable in, among other things. However, this time is different and I'm not sure if it is because of M on my phone or the Windows 10 update. This problem has been going on for over a month now, and I've had both since it started. I've tried all the above mentioned things, along with everything else I can find, and none of them work.
The only way I can get my computer to recognize my phone to share files is to go into device manager every I plug it in is to; go to device manager, right click to update driver, select do it from my pc, select driver in folder. After doing this it works perfectly fine, but I have to do it every time I plug my phone in or every time my phone turns off while it's plugged in. The error message I get on my computer is "USB device not recognized" when I go into device manager it says "device descriptor request failed" It does this on both of my PCs. Any ideas or help would be greatly appreciated!

DT USC said:
I've had this problem before, but I have always been able to fix it by uninstalling ADB and drivers, through WUG's toolkit, changing cables, device manager/update drivers, jumping up and down while spinning and plugging cable in, among other things. However, this time is different and I'm not sure if it is because of M on my phone or the Windows 10 update. This problem has been going on for over a month now, and I've had both since it started. I've tried all the above mentioned things, along with everything else I can find, and none of them work.
The only way I can get my computer to recognize my phone to share files is to go into device manager every I plug it in is to; go to device manager, right click to update driver, select do it from my pc, select driver in folder. After doing this it works perfectly fine, but I have to do it every time I plug my phone in or every time my phone turns off while it's plugged in. The error message I get on my computer is "USB device not recognized" when I go into device manager it says "device descriptor request failed" It does this on both of my PCs. Any ideas or help would be greatly appreciated!
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I think I'm getting something similar since I've installed "M"....
Under:
Settings -> Developer Options -> Select USB Configuration
It say's it's set to "MTP (Media Transfer Protocol)"; it really isn't. When I plug the phone in, under Win 8.1, a desktop window opens with "AOSP on Hammerhead" (or something like that), but there's nothing in it. Now for some magic....
With the phone in one hand, and the mouse in the other:
1. Open Settings -> Developer Options -> Select USB Configuration
2. Touch "MTP (Media Transfer Protocol)" (even if it's already selected)
3. Listen for the PC/Windows Desktop (it should give an audible sound)
4. Immediately click on the "AOSP on Hammerhead" text in the path listed on the open Windows widow ("This PC -> AOSP on Hammerhead")
5. You should see an "Internal Storage" folder appear
6. Open the folder, enjoy MTP