I plugged my Pandigital Novel into my computer for the first time and it started up the update thing. I went through everything it said and it downloaded the update. It then said to hold the power key and the volume + key at the same time for five seonds after the device was powered off. Now it is at a screen where there is the little green android guy and an orange exclamation point inside a white triangle. It wont let me do anything and it wont let me access it from the computer. Help?