Wifi on my Samsung s duos is not working

"When I on the Wifi, it goes into light green mode and does not come into complete green mode[Which is wifi adapter is failing]

Any suggestions on this.

Tried factory re-set but still the same.

Update (09/05/2016)

When I on the Wifi, it goes into light green mode and does not come into complete green mode[Which is wifi adapter is failing]

Any suggestions on this.

Tried factory re-set but still the same."

wifi not torning on way

dail*#*#526#*#* on your phone keypad this will show a message driver software sucessfully installed than try to turn on wifi this will turn no easily

when we on the wifi the siginal ra not displayed on the screen what we should do for that

"is it your own WiFi signal if it is, is it been set with a password for protection preventing other users connection to your signal?

Update

Usually if it's able to pick up the wi-fi network but does not want's to connect is usually with the secuirity settings. you can try by deleating that as you defalt network and the se-activate it (try to reconnect to it) the default proiblem is usually the security settings."