I change the protocol on "static" but now I can't go on the IP address and my Antminer is in grey in "Advanced IP scanner" and "inactive" even if the green light on the machine is on.
Honestly, you don't need to change the protocol from DHCP to static you only need this if you are running multiple miners in the same network and if there is a miner with the same mac address with other devices connected to the same network you will experience some network issue but since you are beginner I think you are running only single miner?
If you can still remember what you put under static protocol you must post it here.
IP:
Netmask:
Gateway:
DNS Server:
I'm sure you didn't follow carefully how to reset the miner to the factory settings you don't need to follow the web GUI reset procedure what you need to do is to hard reset the miner through "reset button" or the "IP report button" make sure that you run the miner first for 10 minutes before you perform the hard reset.