I don't have the ATC 2000 any more, however, I came across the website that has information on how to improve the audio quality and to improve the field of view of the camera.
http://www.utahtrikes.com/ARTICLE-31.html
Hope this helps!

P.S. PPTim, it might be time to open yours up to see if it is repairable?
http://www.utahtrikes.com/ARTICLE-31.html
Hope this helps!

P.S. PPTim, it might be time to open yours up to see if it is repairable?