Cannot connect to my computer! - Galaxy S6 Q&A, Help & Troubleshooting

When I plug in a my tmo galaxy s6 into my windows computer it says "The last USB device you connected has malfunctioned, and windows does not recognize it." The s6 charges fine but I can't get it to connect to my computer. I also tried a mac and it wouldn't give me any mounting options.
I was trying to unroot and return to stock using ODIN (which is something i've done before) but now I'm stuck in a bootloop and I can't get the computer to recognize the device. I've tried to do a factory reset from recovery but it still leads to a bootloop. Any ideas??

Any help please?....

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[Q] Boot Loop. USB not recognized. SD Card won't mount

Essentially What's wrong:
My phone is stuck in a boot loop, computers won't recognize the usb connection, and my sd card won't mount. My SD card is, however, recognizable if I plug it directly to my computer using an adapter.
What Happened:
I rooted my phone using CWM and Odin in order to remove bloatware and enable tethering. After enabling tethering, my computer stopped recognizing my phone. I tried everything to fix it including factory resetting my phone, formatting cache, data, system, and sd card all under the CWM boot menu (hold volup+home+power). Soon afterwards, my phone got stuck in a boot loop. On startup, it hangs on the white "Samsung" logo. While trying to fix the issue, I noticed that my sd card won't mount.
What I've tried:
I've tried this method, but it requires that I either have usb access or access to my phone. I've tried reinstalling the Samsung driver fifteen times. I've tried formatting the SD card in my computer. I've tried using different computers. I've tried using different usb cords. I've tried clearing the registry on my computer, I've tried scouring Google and these forums for a solution. Maybe I'm blind and missed something.
What I'm trying to do:
The way I see it, I need to figure out a way to flash the stock rom back to my phone. In order to do this, I need to get my usb to recognize. If I can do this, the rest is easy. Does anyone has any ideas on what can be done?
Cerei said:
Essentially What's wrong:
My phone is stuck in a boot loop, computers won't recognize the usb connection, and my sd card won't mount. My SD card is, however, recognizable if I plug it directly to my computer using an adapter.
What Happened:
I rooted my phone using CWM and Odin in order to remove bloatware and enable tethering. After enabling tethering, my computer stopped recognizing my phone. I tried everything to fix it including factory resetting my phone, formatting cache, data, system, and sd card all under the CWM boot menu (hold volup+home+power). Soon afterwards, my phone got stuck in a boot loop. On startup, it hangs on the white "Samsung" logo. While trying to fix the issue, I noticed that my sd card won't mount.
What I've tried:
I've tried this method, but it requires that I either have usb access or access to my phone. I've tried reinstalling the Samsung driver fifteen times. I've tried formatting the SD card in my computer. I've tried using different computers. I've tried using different usb cords. I've tried clearing the registry on my computer, I've tried scouring Google and these forums for a solution. Maybe I'm blind and missed something.
What I'm trying to do:
The way I see it, I need to figure out a way to flash the stock rom back to my phone. In order to do this, I need to get my usb to recognize. If I can do this, the rest is easy. Does anyone has any ideas on what can be done?
Click to expand...
Click to collapse
The phone not connecting: I have had this issue before. If you go into the device manager on the computer and show all devices, you can remove all the samsung usb drivers and the root usb drivers from the computer. Reboot the computer and leave the phone unplugged. it will reinstall the main drivers. reboot the phone and hold the buttons to enter recovery, it should still work even while stuck on samsung logo. connect the phone to pc and it should reinstall the drivers and connect properly.
mromblad said:
The phone not connecting: I have had this issue before. If you go into the device manager on the computer and show all devices, you can remove all the samsung usb drivers and the root usb drivers from the computer. Reboot the computer and leave the phone unplugged. it will reinstall the main drivers. reboot the phone and hold the buttons to enter recovery, it should still work even while stuck on samsung logo. connect the phone to pc and it should reinstall the drivers and connect properly.
Click to expand...
Click to collapse
Do you remember at all the name of the drivers that need to be uninstalled? When I plug in my Droid Charge, the computer attempts to install the drivers but it always fails. Under device manager I will then see "unknown deviced" labeled with a yellow exclamation mark. I uninstall that, then plug the phone back in but the same error occurs.
If there are other drivers that I need to uninstall, then I don't know what they're called. None of the devices in the manager say anything referring to samsung.
Cerei said:
Do you remember at all the name of the drivers that need to be uninstalled? When I plug in my Droid Charge, the computer attempts to install the drivers but it always fails. Under device manager I will then see "unknown deviced" labeled with a yellow exclamation mark. I uninstall that, then plug the phone back in but the same error occurs.
If there are other drivers that I need to uninstall, then I don't know what they're called. None of the devices in the manager say anything referring to samsung.
Click to expand...
Click to collapse
go to device manager and choose: view >> show hidden devices
then under the usb drivers look for and uninstall the SAMSUNG if any and uninstall the : Generic USB Hub if any, and uninstall USB Root Hub if any, and reboot computer.
THANK YOU
How don't know how I managed to miss this when trying to fix this over the past week+, but it worked. Getting rid of those root usb devices got my computer to recognize my phone, then I was able to easily use Odin to boot it back to the stock rom. Thank you so much. Crazy how such a simple solution can be the answer.
mromblad said:
go to device manager and choose: view >> show hidden devices
then under the usb drivers look for and uninstall the SAMSUNG if any and uninstall the : Generic USB Hub if any, and uninstall USB Root Hub if any, and reboot computer.
Click to expand...
Click to collapse
Hello. im having the same problem and need help. I find 2 root hubs in the drivers and uninstall them and restart computer, but it installs again the 2 root hubs after restarting computer i press (+ and poverbutton on my galaxy s plus) and then press menu button to go to the settings.. then i plug it in but it still dont recognizes the g disk.. after i reboot the phone it just shows for a little while but i cant acces it... please some advice... THANKS!"
hannu123 said:
Hello. im having the same problem and need help. I find 2 root hubs in the drivers and uninstall them and restart computer, but it installs again the 2 root hubs after restarting computer i press (+ and poverbutton on my galaxy s plus) and then press menu button to go to the settings.. then i plug it in but it still dont recognizes the g disk.. after i reboot the phone it just shows for a little while but i cant acces it... please some advice... THANKS!"
Click to expand...
Click to collapse
hi there,
i am havin the same problem. i just wanted to know if you managed to get a solution? i am desperate. please assist.
Hi there
I'm having same problem with celkon a20. It strucks on erasing data not connecting to PC....please reply me
mromblad said:
The phone not connecting: I have had this issue before. If you go into the device manager on the computer and show all devices, you can remove all the samsung usb drivers and the root usb drivers from the computer. Reboot the computer and leave the phone unplugged. it will reinstall the main drivers. reboot the phone and hold the buttons to enter recovery, it should still work even while stuck on samsung logo. connect the phone to pc and it should reinstall the drivers and connect properly.
Click to expand...
Click to collapse
Hello, have tried uninstalling the USB drivers but Windows 10 re-installs these drivers upon restart. My Samsung SM-N750 is still not detected on via USB, and therefore cannot proceed with Odin firmware flash. Do you have any other suggestions? Many thanks.

[Q] Phone not recognized on PC

When I connect my phone to my PC, it charges perfectly fine but it doesn't get recognized by the PC. I installed the Samsung USB drivers, tried different wires, and tried different USB ports. My phone still doesn't get recognized by the PC.Since my phone has been having a lot of problems lately on 4.3, I needed to connect my phone to Odin because i need to flash the stock 4.3 firmware onto my phone from Odin. But like I said before, my phone doesn't get recognized by the PC.
Because this happens, do I need to get my charging port replaced?

Cant connect to Windows 10 laptop

I installed everything I can think of and my laptop wont recognize my s6 after upgrading to WIN10. Kies v3, check. smart switch, check. Reinstall drivers using smart switch, check. When I plug in the USB cable it charges, but nothing happens on the screen. Cant transfer files or tether. Really frustrating. Any help appreciated
I have win10 as well. The phone is recognized immediately az a storage device and also Odin works without issues. You can try a different port or cable.
I'm having the exact same issue with my samsung s6 (samsung-sm-g920a). After installing WIN10, I haven't been able to connection via phone > laptop. I can send files from the laptop to the phone though, but not the other way around. I've tried putting my cord in all the ports but it won't work.
cant connect s6 to windows 10 via usb
I'm having the s ame issues
Did you try to reinstall the ADB drivers?

Soft BRICKED unable to connect with pc

Due to removal of some system files the phone shows "sorry Google not working......sorry browser not working.....nd so on" even after factory resetting. Android. Os is 2.3.3 gingerbread. The mobile is not connecting to pc using usb cord due to its port problem thats what I think. The phone charges properly but when connected to pc the pc says connected and than disconnected.. No clockwork recovery is installed its just rooted and bricked (phone repairer is unable to connect the phone to pc). Please suggest any solution

Soft brick help!

Hi all
I've had a soft bricked device now for 4 days I've read almost every post on the net to resolve this issue. So my Samsung S6 SM-G920F is stuck on the blue screen saying "An error has occurred while updating the device software. Use the emergency recovery function in the smart switch PC software." I can get into download mode 'recovery' however my phone will not connect to my computer via usb. With an error message stating "usb device not recognised. The last usb device you connected to this computer malfunctioned and Windows does not recognise it.
I have tried:
Changing cables
Changing computer
Deleting drives - rebooting comp to reinstall
Removing kies
Removing smart switch
Reinstalling smart switch
Reinstalling sub drivers
Editing power options and disabling USB ports
Entered HP BIOS and ran a port check which did however result in failure but then same situation on another HP laptop with working ports.
The device is charging when plugged in but not available to flash and reboot/bootloop.
If anyone has a resolution I will be eternally grateful.
Thanks in advance

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