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Tablet isn't recognized when connected via USB


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#1 dominose

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Posted 07 October 2016 - 11:06 AM

I have an Android tablet, when connected to the USB port on my laptop, it doesn't show up in File Explorer.  The laptop is Windows 10. 

Also I didn't find the tablet in Device Manager.

The USB port is working because I can plug a flash drive into it. 

The "USB computer connection" in my tablet is set to MTP. 

A couple weeks ago, it did appear, but now it doesn't. 

???


Edited by dominose, 07 October 2016 - 11:33 AM.


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#2 JohnC_21

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Posted 07 October 2016 - 11:54 AM

The only thing I can recommend is to download USBdeview. Run USBdeview with the tablet not attached. Look for you android device in the list. Remove the listing by highlighting and clicking on the red X. Reboot and attach the tablet to see if is now detected.

 

 http://www.nirsoft.net/utils/usb_devices_view.html



#3 dominose

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Posted 07 October 2016 - 12:17 PM

I tried that.  There are some listings for

Unknown USB Device (Port Reset Failed)

Unknown USB Device (Device Descriptor Request Failed)

Unknown USB Device (Configuration Descriptor Request Failed)

Unknown USB Device (Set Address Failed)

USB Composite Device

 

"device type" is listed as "unknown for all of these"

 

These are on Port_#002.Hub_#003, Port_#002.Hub_#004, Port_#002.Hub_#005.

These look like they might be related to the problem, is it safe to delete these things?


Edited by dominose, 07 October 2016 - 12:18 PM.


#4 dominose

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Posted 07 October 2016 - 12:29 PM

I tried highlighting those devices and clicking on the red X, but nothing happened. 



#5 JohnC_21

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Posted 07 October 2016 - 12:31 PM

If you close out USBdeview and run it again are the items still listed?

 

Edit: If the items are still listed right click USBdeview and select Run As Administrator.


Edited by JohnC_21, 07 October 2016 - 12:33 PM.


#6 dominose

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Posted 07 October 2016 - 01:04 PM

I uninstalled those unknown composite USB devices and restarted my laptop, but it's still not recognizing the tablet.  That got rid of those "unknown composite" devices. 

 

Usbdeview also has some listings for "Atmel maxtouch digitizer", which seem to be related to the tablet because of the time shown.  Maybe I should uninstall those too?


Edited by dominose, 07 October 2016 - 01:05 PM.


#7 JohnC_21

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Posted 07 October 2016 - 01:22 PM

I am not sure about that listing. You can look at the below program. It lists all non-present devices. If your computer has a touch screen I would not remove it but if you never had some digitizer attached I think it would be safe to remove. Have you tried attaching the tablet to another computer?

 

http://www.thewindowsclub.com/device-cleanup-tool-windows

 

From this post it does seem related to a tablet. What is the make of this tablet? 



#8 dominose

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Posted 07 October 2016 - 01:23 PM

It didn't work. 

I uninstalled all the devices listed in the Usbdeview screen that might be related to the tablet, and restarted my laptop.  It's still not recognizing the tablet. 



#9 dominose

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Posted 07 October 2016 - 01:37 PM

Have you tried attaching the tablet to another computer?

 

From this post it does seem related to a tablet. What is the make of this tablet? 

Good idea, I tried connecting the tablet to an old laptop, and the old laptop also doesn't recognize it. 

So it seems to be a problem of the tablet, not the laptop. 

It's a Zenpad.



#10 JohnC_21

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Posted 07 October 2016 - 01:41 PM

Do you have a model number of the Zenpad. Asus's support site lists quite a few.



#11 dominose

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Posted 07 October 2016 - 01:47 PM

ASUS ZenPad S 8.0 ‏(Z580C)

#12 JohnC_21

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Posted 07 October 2016 - 01:56 PM

See this page. Use at your own risk. The zip file has a link for a video that shows how to install. The zip file only has up to Windows 8.1 but 10 may be able to install it. It looks like Windows 10 is being used in the video. I would at least scan the files with virustotal.com. If you do install create a restore point first.

 

https://androidmtk.com/download-asus-usb-drivers



#13 dominose

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Posted 07 October 2016 - 02:33 PM

I downloaded something called "Share Link" that transfers files wirelessly.  That works, anyway. 
I don't know why the USB method doesn't work but thanks for your help :)



#14 rqt

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Posted 07 October 2016 - 02:49 PM

At the risk of asking a stupid question - did you try a different USB cable?



#15 dominose

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Posted 08 October 2016 - 04:52 AM

At the risk of asking a stupid question - did you try a different USB cable?

And that did it!

I had gotten a USB cable that looks identical, it came with a bike light.  I guess I was trying to connect with that one, but it wasn't actually identical. 

Apparently some USB cables are designed to transfer data and some are just for charging. 

Thanks! 


Edited by dominose, 08 October 2016 - 06:58 AM.





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