Why is my iPad 2 stuck on reboot?

Hi.

I've replaced my digitizer and now after I have reassembled the iPad 2, it won't start up (it keeps rebooting). I've tried a hard reboot, let it run out of power, reset it via iTunes, but without any luck so far. I was able to take a picture of the start up screen (not the apple), but I don't know how to share it.

All help will be greatly appreciated.

Kind regards.