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  1. Thread Author  Thread Author    #1  
    tenstrum's Avatar

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    Default Nexus 7 suddenly unrecognized USB device

    So something weird going on with my Nexus 7. A couple of days ago, my laptop stopped recognizing my Nexus 7 and I'm getting "Unrecognized USB Device".
    I've googled the crap out of this. Tried uninstalling/reinstalling drivers through ADB, Nexus 7 Toolkit, and the stand alone downloaded with manual browsing. USB Debugging is enabled. I've rebooted the device and my laptop multiple times. I've followed many different solutions and nothing is working!
    Any ideas?
    I don't understand why it just stopped being recognized all of a sudden.
  2. #2  

    Default Re: Nexus 7 suddenly unrecognized USB device

    go to settings > storage > 3 dots at top right > usb > and make sure you are set to Media device (MTP) and not Camera (PTP)

    the second thing to ensure is that you use the EXACT SAME USB PORT on the laptop that used to work.

    If neither of those work, update your laptop USB drivers from Microsoft... they may have gotten corrupted
  3. Thread Author  Thread Author    #3  
    tenstrum's Avatar

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    Default Re: Nexus 7 suddenly unrecognized USB device

    I've tried both MTP and PTP with no luck.
    Also tried every USB port including the one that worked originally.
    I'll check for USB drivers, but dont believe they have any.
  4. #4  

    Default Re: Nexus 7 suddenly unrecognized USB device

    Quote Originally Posted by tenstrum View Post
    I've tried both MTP and PTP with no luck.
    Also tried every USB port including the one that worked originally.
    I'll check for USB drivers, but dont believe they have any.
    yeh, they always do but they generally work well without issues with the default install



    those are USB drivers for XP thru win7

    also you should check your cable for cut wires, broken or bent pins etc or simply use a different cable
  5. #5  

    Default Re: Nexus 7 suddenly unrecognized USB device

    My N7 connected great to my win7-64 pc until one day I picked up the cable to plug in my N7 (cable was already connected to pc) and created a static shock to the microusb end connector on the cable. Plugged it into the N7 and couldn't connect. It wouldn't connect using any of the 4 ports in that bank of ports. Other ports still work and the N7 will connect properly to any port other than the back of 4 that got zapped.
  6. Thread Author  Thread Author    #6  
    tenstrum's Avatar

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    Default Re: Nexus 7 suddenly unrecognized USB device

    No luck.
    I've tried 2 other PCs and 3 different cables. Still come up as unrecognized device regardless of the correct drivers.
    USB Debugging is enable and set to MTP mode.
    Any more ideas? Starting to think my Nexus 7 is damaged...
  7. #7  

    Default Re: Nexus 7 suddenly unrecognized USB device

    USB debugging should NOT be enabled for most uses.

    I would give google/asus support a shout and then you will likely need to return it for repair. Sounds like you might have zapped the N7 port with a shot of static or had a chip fail.

    I assume you can still charge the N7 so not everything has failed ?
  8. #8  

    Default Re: Nexus 7 suddenly unrecognized USB device

    I am unable to see my Nexus 7 via USB but I'm also experiencing issues while charging. It will not charge or recognize anything is plugged into the micro USB when powered on. Only when powered off.

    Asus support told me they could not help me and I should contact someone with regards to the OS. Basically, they said it's not their issue and I've already tried all the troubleshooting they recommended.

    Are you having this issue, too? What version are you running?
  9. Thread Author  Thread Author    #9  
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    Default Re: Nexus 7 suddenly unrecognized USB device

    I can charge without any issues.
  10. #10  

    Default Re: Nexus 7 suddenly unrecognized USB device

    Do you guys have passwords on your tablets? My laptop won't pick it up unless I unlock before connecting. I had the same problem. It was working and then it wasn't.

    Tom

    Sent from my Nexus 7 using Tapatalk HD
  11. Thread Author  Thread Author    #11  
    tenstrum's Avatar

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    Default Re: Nexus 7 suddenly unrecognized USB device

    Yes, but that isn't the issue. It detects as an unrecognized device when it gets unlocked.
    Thanked by:
  12. #12  

    Default Re: Nexus 7 suddenly unrecognized USB device

    Did you try it with USB debugging turned off yet? Unless you need that turned on for something it should be off.
  13. Thread Author  Thread Author    #13  
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    Default Re: Nexus 7 suddenly unrecognized USB device

    Yes. Tried it both ways. I rooted it when i first got the device is why I had it turned on. And before anyone asks, yes it was being recognized after it was rooted. I still have stock Android 4.2.1 on it. This problem just developed about a week ago. I have changed nothing on the tablet.
  14. Thread Author  Thread Author    #14  
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    Default Re: Nexus 7 suddenly unrecognized USB device

    Chatted with ASUS today and they recommended a Factory Reset. Don't think it will help, but what have I got to lose.
  15. Thread Author  Thread Author    #15  
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    Default Re: Nexus 7 suddenly unrecognized USB device

    Well the factory reset didn't do jack.
  16. #16  
    major payne's Avatar

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    Default Re: Nexus 7 suddenly unrecognized USB device

    this is not a problem with the N7 this is (95%) a problem with the PC I go through this a few times a month where i have to delete the drivers and then re-add them using WUGs toolkit works every time
    Palm Centro, Palm Pre +, HTC Rezound, Samsung Galaxy S4
  17. Thread Author  Thread Author    #17  
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    Default Re: Nexus 7 suddenly unrecognized USB device

    Quote Originally Posted by Major Payne View Post
    this is not a problem with the N7 this is (95%) a problem with the PC I go through this a few times a month where i have to delete the drivers and then re-add them using WUGs toolkit works every time
    I tried WUGs toolkit and it did not work. I have also tried on several other PCs using differnt cables and that did not work either.
  18. Thread Author  Thread Author    #18  
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    Default Re: Nexus 7 suddenly unrecognized USB device

    I tried using StickMount to mount a USB drive that i had previously been able to mount to my Nexus and it was unable to see it. Really think my Nexus is broke...
  19. #19  
    major payne's Avatar

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    Default Re: Nexus 7 suddenly unrecognized USB device

    hmm that does then sound like the N7 has a bad port
    Palm Centro, Palm Pre +, HTC Rezound, Samsung Galaxy S4
  20. #20  

    Default Re: Nexus 7 suddenly unrecognized USB device

    I read other threads where people had the same issue. They damaged their nexus usb port using a car charger.
    They had to return it back to Asus for repair....

    Envoy depuis mon GT-N7100 avec Tapatalk
  21. #21  

    Default Re: Nexus 7 suddenly unrecognized USB device

    Hmm - I had this problem with other devices - advice was to disconnect PC from Mains and leave for a while - worked for me. On a laptop I assume this will mean taking out the laptop battery? Worth a try!
  22. Thread Author  Thread Author    #22  
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    Default Re: Nexus 7 suddenly unrecognized USB device

    Quote Originally Posted by MadHorseman View Post
    Hmm - I had this problem with other devices - advice was to disconnect PC from Mains and leave for a while - worked for me. On a laptop I assume this will mean taking out the laptop battery? Worth a try!
    I've tried on several PCs with no luck.
  23. Thread Author  Thread Author    #23  
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    Default Re: Nexus 7 suddenly unrecognized USB device

    Anyone know of a way to relock the bootloader without having it connected to a PC?
  24. Thread Author  Thread Author    #24  
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    Default Re: Nexus 7 suddenly unrecognized USB device

    Got my Nexus 7 back. Everything is working perfectly! Already unlocked and rooted.
    Wish I knew what caused the problem though.
  25. #25  

    Default Re: Nexus 7 suddenly unrecognized USB device

    Tenstrum! where did you send your Nexus 7 to fix your problem? i have the same problem as you!! please help!!
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