Ringnecks and Alexandrines are famous for their love of finding new things to chew! All you can do is go through your house and safely hide all cords and cables away from your bird. Also, make sure she cannot perch anywhere near exposed wooden things like door or window frames (you should see mine: they've been chomped right back to the wall!)
At the same time, you must remove her every time she goes to bite or chew something she shouldn't. For example, my Barney has a love of biting buttons in half. As soon as he sees one, he rushes to it and usually has it bisected in two before the owner even knows what he's doing. It can get rather embarrassing with visitors to the house. Whenever Barney goes for a button, I remove him to his perch or put him back in his cage. I have to be honest and say I haven't seen all that much improvement, but there's been some. Like most aspects of bird training, you have to do it
every time the bird misbehaves and be prepared to do it for a long time before the bird realises fully what you're trying to teach him.
If your bird is lunging at people to bite them, offer her the back of your tightly closed fist. It's hard for her to grab your tightened skin with her beak and hopefully she will learn that biting doesn't really work for her. Show your family members how to do this as well. You will all learn very quickly how to turn your hand so that she always sees the back of it and therefore cannot get hold of your flesh!
One last suggestion is that birds often begin biting when they've become tame enough to step up and everyone wants to have a turn holding them. They (the birds) get heartily sick of being told 'step up step up step up' and will start biting to let you know they're not happy. So watch your bird and don't ask her to do things she doesn't really want to do. Work slowly with her and only for short periods so she doesn't get bored or cross with you.
I wish you luck with your ringneck. Don't give up hope: they go through these stages and if you simply stay calm and don't be in too much of a hurry, she'll be fine!
