Welcome to the club.  The reset method post above does not work.  I have 3 S3 miners and tried resetting them at least 25 times and there is no way to do it that I know of.  Even bitmain states that if you forget the IP address you can never access the miner again.  As far as I can tell the reset button doesn't do anything at all.c

From Bitmain: *** If you decide to change the AntMiner's IP address, Please Write It Down &
DO NOT FORGET
it.
If you forget the IP address, you will not be able to access AntMiner again. ***