Considering you were able to access it before changing the IP settings, you should just reset your S3 using the physical button.
I also suggest you don't modify things you don't really know.
I also suggest you don't modify things you don't really know.
With some settings this is very true. For example networking modify wrong one, or wrong settings it becomes possible to make it not talk on the network. Luckily a reset can fix a lot of things on most BM miners.
When you change networking setting it should be like that old motto "Measure twice and cut once". If you are not sure double check or even ask on forum.
