It will scan the main local ip, if the antminer is connected and running it will show up.
If the lan was deleted trying to reset is tje only hope, make sure you are really pushing thr button, open uo tje antminer s3 and check it out from there.
It only found anything connected that matched the router IP. For example if the router is set to 192.168.0.1 it won't find the miner if it is set to 192.168.1.99. I had to change the router to 192.168.1.1 to find a miner with IP 192.168.99. So if the miner is set to 192.138.300.99 I would have to change the router settings 300 times before finally finding it. The reset button doesn't do anything on all 3 of my S3. It's like they put a fake button on all of the S3.