6 ContentsSound and Speaker Problems . . . . . . . . . . . . . . 70No sound from speakers . . . . . . . . . . . . . . 70No sound from headphones . . . . . . . . . . . . 71Video and Monitor Problems . . . . . . . . . . . . . . 71If the screen is blank . . . . . . . . . . . . . . . . 72If the screen is difficult to read . . . . . . . . . . . 724 Troubleshooting Tools . . . . . . . . . . . . . . . 75Power Lights . . . . . . . . . . . . . . . . . . . . . . . 75Beep Codes . . . . . . . . . . . . . . . . . . . . . . . 76System Messages . . . . . . . . . . . . . . . . . . . . 78Dell Diagnostics . . . . . . . . . . . . . . . . . . . . . 80When to Use the Dell Diagnostics . . . . . . . . . 80Starting the Dell Diagnostics FromYour Hard Drive . . . . . . . . . . . . . . . . . . . 80Starting the Dell Diagnostics From theDrivers and Utilities Media . . . . . . . . . . . . . 81Dell Diagnostics Main Menu . . . . . . . . . . . . 81Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . 83What is a Driver? . . . . . . . . . . . . . . . . . . 83Identifying Drivers . . . . . . . . . . . . . . . . . 84Reinstalling Drivers and Utilities . . . . . . . . . . 84Resolving Software and HardwareIncompatibilities . . . . . . . . . . . . . . . . . . . . . 87Restoring Your Operating System . . . . . . . . . . . . 88Using Microsoft Windows System Restore . . . . 88Using Dell PC Restore and Dell FactoryImage Restore . . . . . . . . . . . . . . . . . . . 91Using the Operating System CD . . . . . . . . . . 94
