Dell H7228 manual Video and Monitor Problems, No sound from headphones, If the screen is blank

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REINSTALL THE AUDIO (SOUND) DRIVER — See page 49.

CHECK FOR INTERRUPT REQUEST CONFLICTS — See page 52.

No sound from headphones

CHECK THE HEADPHONE CABLE CONNECTION — Ensure that the headphone cable is securely inserted into the headphone connector (see page 53).

DISABLE DIGITAL MODE — Your headphones do not work if the CD drive is operating in digital mode. To disable digital mode:

1 Click the Start button, click Control Panel, and then click Sounds, Speech, and Audio Devices. 2 Click Sounds and Audio Devices.

3 Click the Hardware tab.

4 Double-click the name of your CD drive. 5 Click the Properties tab.

6 Uncheck the Enable digital CD audio for this CD-ROM device box.

ADJUST THE WINDOWS VOLUME CONTROL — Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume is turned up and that the sound is not muted.

Video and Monitor Problems

If the screen is blank

NOTE: See the monitor documentation for troubleshooting procedures.

CHECK THE MONITOR POWER LIGHT — If the power light is off, firmly press the button to ensure that the monitor is turned on. If the power light is lit or blinking, the monitor has power. If the power light is blinking, press a key on the keyboard or move the mouse.

CHECK THE MONITOR CABLE CONNECTION — Check the connector for bent or broken pins. (It is normal for monitor cable connectors to have missing pins.) Ensure that the video cable is connected as shown on the setup diagram for your computer.

TEST THE ELECTRICAL OUTLET — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.

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Solving Problems

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Contents Dell Dimension 4600C USB 2.0 connectors Ieee 1394 connectorAbbreviations and Acronyms Contents Mail, Modem, and Internet Problems Program is designed for an earlier Microsoft WindowsUsing Microsoft Windows XP System Restore Resolving Software and Hardware IncompatibilitiesAppendix Safety Instructions Safety InstructionsW . d e l l . c o m s u p p o r t . d e l l . c o m Tips on using Windows How to clean my computerFinding Information for Your Computer Microsoft Windows License LabelAnswers to technical service Downloads Drivers, patches, and software updatesHow to use Windows XP Support questionsConnecting the AC Adapter Japan only Setting Up and Using Your ComputerAttaching and Removing the Computer Stand Tabs Tab holes Setting Up and Using Your ComputerScrew Setting Up a Printer Connecting a Parallel Printer Parallel connector on computerPrinter Cable Screws Clips Parallel printer Cable NotchesConnecting a USB Printer USB connector on computerConnecting an Ieee 1394 Device Optional Setting Up a Home and Office NetworkConnecting to a Network Adapter Ieee 1394 connector Ieee 1394 cableNetwork Setup Wizard Network cableConnecting to the Internet Setting Up Your Internet ConnectionHow to Copy a CD or DVD Copying CDs and DVDsHyper-Threading Using Blank CD-Rs and CD-RWsHelpful Tips Booting to a USB Device Turning Off Your ComputerSetting Up and Using Your Computer Finding Solutions Solving ProblemsW . d e l l . c o m s u p p o r t . d e l l . c o m See Battery Problems Finding Help InformationCD drive problems Drive ProblemsProblems writing to a CD-RW drive DVD drive problems Mail, Modem, and Internet ProblemsHard drive problems Solving Problems Error Messages Operating System not Found Contact Dell seeGeneral Problems Computer stops respondingProgram stops responding Program crashes repeatedlyOther software problems Solid blue screen appearsOther technical problems General hardware problemsIeee 1394 Device Problems Keyboard ProblemsMouse Problems PC Card Problems Network ProblemsLink activity light Power Problems Printer Problems Scanner Problems Sound and Speaker Problems No sound from speakersNo sound from headphones Video and Monitor ProblemsIf the screen is blank If the screen is difficult to read Solving Problems Light Pattern Problem Description Suggested Resolution Diagnostic LightsAdvanced Troubleshooting Modules installed, remove Modules, reinstall one moduleNormally, reinstall an additional Identified a faulty module orRemove the card and reinstall it If the problem persists orIf the computer has a video card See page 66, and restartDell Diagnostics Starting the Dell Diagnostics Option FunctionWhat Is a Driver? DriversIdentifying Drivers Tab FunctionReinstalling Drivers Restoring Your Operating SystemUsing Microsoft Windows XP System Restore Restoring the Computer to an Earlier Operating StateUsing Dell PC Restore by Symantec Enabling System Restore Resolving Software and Hardware IncompatibilitiesFront View Front and Back View of the ComputerAdding Parts More information Unexpectedly restartInstead, perform an operating system shutdown Back View Network jack Modem jack Reattaching the Front Door Hinge arms Closed position Opening the Computer CoverFront door Cable security tab Back of computer Adding PartsLooking Inside Your Computer System Board Adding PC Cards Optional PC Card TypesInstalling a PC Card Removing a PC Card Adding Other Cards Adding or Replacing a Video Card Removing a Video Card Notch Lever Tab card clip AGP connector PCI connectorHinged lever Filler bracket Adding Memory Installing a Video CardDDR Memory Overview Installing Memory Securing clips Connector Notch Memory module Cutouts CrossbarRemoving Memory Closing the Computer Cover Specifications MicroprocessorSystem Information Expansion BusPorts and Connectors MemoryDrives VideoPower AudioNetwork Controls and LightsIs 914 m 3000 ft Environmental914 m 3000 ft Standard Settings Viewing Settings Clearing Forgotten PasswordsSystem Setup Screens Replacing the Battery Battery Dell Technical Support Policy U.S. Only Definition of Dell-Installed Software and PeripheralsDefinition of Third-Party Software and Peripherals FCC Notices U.S. Only Class a Class BContacting Dell FCC Identification InformationAppendix Appendix Appendix Appendix Area Codes Local Numbers, Toll-Free Numbers Appendix Area Codes Local Numbers, Toll-Free Numbers Appendix Appendix Appendix Appendix 800 300 412 or 21 422 07 Appendix Appendix Toll-free Or toll-free Appendix Index Index 101Index 102 IndexIndex 103 Index 104