6 ContentsSound and Speaker Problems . . . . . . . . . . . . . . 77No sound from speakers . . . . . . . . . . . . . . 77No sound from headphones . . . . . . . . . . . . 78Video and Monitor Problems . . . . . . . . . . . . . . 79If the screen is blank . . . . . . . . . . . . . . . . 79If the screen is difficult to read . . . . . . . . . . . 804 Troubleshooting Tools . . . . . . . . . . . . . . 81Power Lights . . . . . . . . . . . . . . . . . . . . . . . 81Beep Codes. . . . . . . . . . . . . . . . . . . . . . . . 82System Messages . . . . . . . . . . . . . . . . . . . . 84Dell Diagnostics . . . . . . . . . . . . . . . . . . . . . 86When to Use the Dell Diagnostics . . . . . . . . . 86Starting the Dell Diagnostics From YourHard Drive. . . . . . . . . . . . . . . . . . . . . . 86Starting the Dell Diagnostics From the Driversand Utilities Media . . . . . . . . . . . . . . . . . 87Dell Diagnostics Main Menu . . . . . . . . . . . . 87Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . 89What Is a Driver? . . . . . . . . . . . . . . . . . . 89Identifying Drivers . . . . . . . . . . . . . . . . . 90Reinstalling Drivers and Utilities . . . . . . . . . . 90Restoring Your Operating System . . . . . . . . . . . . 93Using Microsoft Windows System Restore . . . . . 94Using Dell PC Restore and Dell FactoryImage Restore . . . . . . . . . . . . . . . . . . . 95Using the Operating System Media. . . . . . . . . 98Troubleshooting Software and HardwareProblems . . . . . . . . . . . . . . . . . . . . . 100
