Sorry to say I did this to my first s3 by accident. Nothing u can do unless u can get it into download mode. Which the only way you can do that with a hard brick is by using a jig. Google galaxy s3 jig. U can buy one cheap or watch a YouTube video on how to make one for around $2. But other than that ur only option is to turn it into the phone insurance or maybe Verizon will jtag it for u. U can Google jtag as well. That's all the help I have for u. Good luck!!!!!
Sent from my Verizon Wireless Galaxy S3
White Galaxy S III