Contents 9Sound and Speaker Problems . . . . . . . . . . . . . 122No sound from integrated speakers . . . . . . . . 123No sound from external speakers . . . . . . . . . 123No sound from headphones . . . . . . . . . . . . 123Touch Pad or Mouse Problems . . . . . . . . . . . . . 124Video and Display Problems . . . . . . . . . . . . . . 125If the display is blank . . . . . . . . . . . . . . . . 125If the display is difficult to read . . . . . . . . . . 125If only part of the display is readable . . . . . . . 126Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . 126What Is a Driver? . . . . . . . . . . . . . . . . . . 126Identifying Drivers . . . . . . . . . . . . . . . . . 127Reinstalling Drivers and Utilities . . . . . . . . . . 127Troubleshooting Software and HardwareProblems . . . . . . . . . . . . . . . . . . . . . . . . . 130Restoring Your Operating System . . . . . . . . . . . . 130Using Microsoft Windows System Restore . . . . 131Using Dell PC Restore by Symantec . . . . . . . . 131Using the Operating System Media . . . . . . . . 13412 Adding and Replacing Parts . . . . . . . . . 137Before You Begin . . . . . . . . . . . . . . . . . . . . 137Recommended Tools . . . . . . . . . . . . . . . . 137Turning Off Your Computer . . . . . . . . . . . . . 137Before Working Inside Your Computer . . . . . . . 138
