Hi and welcome to the forum:
If you know that the battery has energy and is able to power the camera, very likely the motor that extends the lens and focuses it has died. Given that this is a 15 year old model, thus it is well past its support life, and it is unlikely that you can achieve a do-it-yourself repair, it might be time to consider investing in a new camera. The technology has improved greatly over the intervening period, so you will gain much benefit from that.
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
