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The basis of the PDA screen is a piece of glass with a Mylar coating on it. The glass plate has a metallic coating that faces a metallic coating on the underside of the Mylar.
Pressing the screen brings the two layers of either type of screen into contact and an electrical current flows through them. The shorter the path to the edge of the screen from the place the stylus touches, the more current flows through the layers. By measuring the electrical current from the two sides of the display, the operating system determines the vertical and horizontal position of the stylus. By sampling the locations 100 times a second, the display can detect the movement.
Sounds like you may have melted the Mylar coating from your Axim. :o
Mike
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