USB device not recognized after root

[Sandeep Dabas]

Hello all,
(sorry for my bad english)
Last week m trying to root my Samsung Galaxy Tab 2 P3100 (India).
But not success.
After this try my Tab not connected with any PC (im trying on 3pc).
Its show me a error ''Usb Device Not Recognized'' .
Odin also not connect my tab.
Now m trying to unroot device with SD card but not successfull..
Please Help me guys..
How cam back my old OS.. plz... plz...
Note : m check my USB cable also.

i have 2 screenshots.

 

[Anshuman Goyal]

I am stuck with the same thing. I am able to come to Download Recovery mode but my USB device is not getting recognized. I am badly stuck with this. Can you please help me out what all solution you had.