How can I get my computer to recognize I have attached my tablet? I have tried every trick online with no luck.

Couple notes:

  • No indication at all from computer that a tablet is plugged in (No yellow exclamation marks in device manager, no sound upon plugging in)
  • I have tried multiple cables ( I believe this may be a hardware issue), multiple usb ports
  • I have tried all sorts of driver install methods as well as usb debugging modes
  • The only indication I get is a red x on the tablet over the battery when plugged in. The tablet charges fine when plugged into the wall charger.
  • My other galaxy tab 10.1 original communicates with the computer fine ( I have since reformatted the tablet and computer and have tried multiple computers)

Currently using: - Thinkpad T61 with aging battery - Samsung Galaxy Tab 2 10.1 (SGH-T779) T-mobile - Windows 8 (Have tried with a fresh copy of Windows 7) - Running Android 4.1.2

The only indication I have gotten from the pc that the tablet was plugged in was the mouse changing from an arrow to a thinking symbol for less than 1 second. I feel as though I have tried everything and it is a broken port on the tablet. It charges fine when the tablet is off.

Overall, I wish to root the tablet to put a custom rom on it. I have tried rooting the tablet using various apk's w/out a PC but have had no luck (I will probably post another question about troubleshooting root process with no PC).

Thanks in advance

  • This might be a point to start: android.stackexchange.com/questions/6358/… Have you installed the Samsung USB drivers for your device? Is there a version of Kies you can install? Root without a PC is very messy on samsung devices buit it is possible, I've posted an answer for the S3 that's a starter to getting into it.
    – RossC
    Commented Jun 16, 2014 at 13:53
  • Does the tablet think it's plugged into the PC? If it does, there'll be a notification that USB is connected, and possibly a second if USB debugging is enabled too.
    – Dan Hulme
    Commented Jun 16, 2014 at 15:36
  • There was no indication at all from the tablet or the computer that it was connected other than a red x on the tablet. I used PC software that was supposed to be even better than microsoft device manager and identify devices but that had no luck.
    – Nathan
    Commented Jul 18, 2014 at 2:36

1 Answer 1


This might sound crazy, and I do not recommend anyone try it, but...

I had tried cleaning the female charging port on the tablet with alcohol and q-tips and had no luck. I decided to use the tip of a mechanical pencil (metal tip) to scrape the contacts to see if they had build up. I put the metal tip in to scuff them up and (since the tablet was on), a huge spark shot out of the tablet and it immediately shut off. I assumed I fried it, but it turned back on... ...and worked perfectly from that point on. It was then recognized by my computer.

Obviously, this is somewhat crazy and I don't recommend people try this. I had tried every method of connection from the far ends of the internet with no luck. Somehow it worked normally after this point. Could the spark/firework show have cleaned the contacts? I know that some pins are for charging (which it would do fine) and other pins are for data.

My tablet is now working.

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