A method includes applying a power control signal from a computer system to a display device, and maintaining the display device in a first reduced power consumption state while the power control signal is applied. To assemble the sensor, the reusable element is snapped or slid within assembly mechanisms of the disposable element. Thus, media such as audio, video, display, photo, spreadsheet, Web Clips, and HTML pages can be combined into a media file for uploading to a server and accessed from listings posted at web sites. The conductive layer enhances thermal conduction and structural stiffness for the assembly. The transparent conductive film includes a first portion which none of the first insulating film and the second insulating film underlie. The circuit also includes a switch and a switch control device for controlling the switch to provide power factor correction.