Device always boots in recovery mode, but apparently there is no recovery partition We have a BSNL Penta IS709c (cheapest tablet currently available / Oct 2012) running Android 4.0.

Feeling adventurous, I issued reboot recovery through adb and the device tried to reboot in recovery mode. However turns out that there is probably no recovery partition and the device is stuck at following screen. Rebooting the device doesn't help and it always boots to following screen.

So, what can I do to boot it back in normal mode? I'd also like to point out that this device does not has Volume Up and Volume Down buttons. Available 4 physical buttons are Power/Home/Menu/Back.
Press the power button for 10 seconds and its going to reboot itself if you have not corrupted any system partitions. Or try adb reboot bootloader and from there select the start button and press it with the power key.