Contents 7IEEE 1394 Device Problems . . . . . . . . . . . . 119Keyboard Problems . . . . . . . . . . . . . . . . 120Lockups and Software Problems . . . . . . . . . 120Memory Problems . . . . . . . . . . . . . . . . . 122Mouse Problems . . . . . . . . . . . . . . . . . . 123Network Problems . . . . . . . . . . . . . . . . . 124Power Problems . . . . . . . . . . . . . . . . . . 124Printer Problems . . . . . . . . . . . . . . . . . . 125Scanner Problems . . . . . . . . . . . . . . . . . 126Sound and Speaker Problems . . . . . . . . . . . 127Video and Monitor Problems . . . . . . . . . . . . 128If only part of the display is readable . . . . . . . 130Power Lights . . . . . . . . . . . . . . . . . . . . . . 13010 Reinstalling Software . . . . . . . . . . . . . . 133Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . 133What Is a Driver? . . . . . . . . . . . . . . . . . . 133Identifying Drivers . . . . . . . . . . . . . . . . . 133Reinstalling Drivers and Utilities . . . . . . . . . . 134Troubleshooting Software and Hardware Problems . . 136Restoring Your Operating System . . . . . . . . . . . . 137Using Microsoft Windows System Restore . . . . 137Using Dell™ PC Restore andDell Factory Image Restore . . . . . . . . . . . . 139Using the Operating System Media . . . . . . . . 14211 Adding and Replacing Parts . . . . . . . . . 143Before You Begin . . . . . . . . . . . . . . . . . . . . 143Recommended Tools . . . . . . . . . . . . . . . . 143