Try taking out the battery, then put it on a charger without the battery in it. When i did that it made a little buzz sound and i saw that my phone was accepting charge again. Now you might face another problem getting stuck in a boot loop. What worked for me was turning the phone off again, but just with the battery in it and charger connected and held both volume keys but not the power button. And it took me to CwM recovery. I don't know if your phone has it by default, but i have it. I have the a600 golden warrior