crwdns2933897:0crwdne2933897:0

Why ANC is not working properly? how to fix it?

I am unable to use my ANC in Marshall MID ANC, so how can I fix it at home.
Also, what can be reasons of not working ANC?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0