bsnl is709c android tablet is not booting up My BSNL penta IS709C tablet got locked after too many unlock attempts. After that I tried to hard reset by pressing BACK + HOME + MENU buttons together with the power button but in vain. Tablet present condition:

1) USB debugging off, so no adb commands.  2) wifi is off. 3) No
    associated google account.

Please help me restore the tablet or suggest me how can I hard reset it.
So after battling for two days, finally I have managed to solved this problem.

First of all download stock ROM for your tablet from here
and extract the file anywhere you want.

Note:- All the below steps are provided in .ppt file which you can find in the downloaded zip folder(here ..\BSNL-IS709C\BSNL IS709C\Firmware\upgrade\tool). Since it is a Chinese version so I thought it might help if I re-write the steps here:


Shut down your tablet.
take out your SDCard if you don't want data loss.
Plug one end of the Usb cable to PC/Laptop.
Press the middle button(namely menu button) of the three buttons on the tablet and the power button together and then plug another end of the Usb cable to the tablet.
After this, your computer will try to install drivers for your device which you can ignore because you are gonna install the drivers manually.
go to device manager->Other devices->right click on the unknown device(which is yours with yellow triangle) and then click on update driver software.
Choose to manually locate drivers and move to this directory (..\BSNL-IS709C\BSNL IS709C\Firmware\upgrade\tool\Driver).
Select the appropriate driver(x86/x64) and click OK, a red color pop up is displayed. Click yes(or whatever) to install the drivers.
Now open the RKBatchTool provided here(..BSNL-IS709C\BSNL IS709C\Firmware\upgrade\tool). You will see a green color square on it which means that it has recognized your device. Meanwhile is the Chinese version, so can refer this picture for further operation:





Click on the Restore button to factory reset the tablet and when its done. Click on upgrade.
Restart the tablet and voila, its done!!