My trackpad quit answering so I turned off, removed the battery, stroked the trackpad as I reinstalled the batt and it loaded and worked to respond to the button push. Still doesn't work to stroke, but did the foil trick on my finger and worked! Put foil around a pencil eraser with tape and it works...good enough for me. New pad costs approx $4-6. and other sites show how to replace with some skill and time. Thanks!