750 GL login problems

Hi all, After resetting with the Reset Button, router will let me not login anymore, tried everything many times.
Is there another way to get the Router board to factory setting? Jumper hole perhaps? How does that work?
Sorry for asking stupid Question , I am old and new to the Game.
Cheers Michael

make sure you are not connecting to port 1, because it has firewall.
connect to ports 2-5. default username is “admin” and there is no password (unless your device came with non-standard config applied by the seller)