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Dell H7228 manual If the screen is difficult to read

Models: H7228

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SWAP THE POWER CABLES — Swap the computer and monitor power cables to determine if the power cable is defective.

TEST THE VIDEO EXTENSION CABLE (IF USED) — If you are using a video extension cable and removing the cable solves the problem, the cable is defective.

TEST ANOTHER MONITOR — If another monitor is available, connect it to the computer.

CHECK THE DIAGNOSTIC LIGHTS — See page 43.

If the screen is difficult to read

CHECK THE MONITOR SETTINGS — See the monitor documentation for instructions on adjusting the contrast and brightness, demagnetizing (degaussing) the monitor, and running the monitor self-test.

MOVE THE SUBWOOFER AWAY FROM THE MONITOR — If your speaker system includes a subwoofer, ensure that the subwoofer is at least 60 cm (2 ft) away from the monitor.

MOVE THE MONITOR AWAY FROM EXTERNAL POWER SOURCES — Fans, fluorescent lights, halogen lamps, and other electrical devices can cause the screen image to appear "shaky." Turn off nearby devices to check for interference.

ROTATE THE MONITOR TO FACE A DIFFERENT DIRECTION — Eliminate sunlight glare, which can cause poor picture quality.

ADJUST THE WINDOWS® DISPLAY SETTINGS —

1 Click the Start button and click Control Panel.

2 Click Appearance and Themes.

3 Click Display and click the Settings tab.

4 Try different settings for Screen resolution and Color quality.

RESTORE THE RECOMMENDED SETTINGS — Restore the original resolution and refresh rate settings. See the Tell Me How help file for instructions. To access help files, see page 25.

Solving Problems

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Dell H7228 manual If the screen is difficult to read

Contents

USB 2.0 connectors Ieee 1394 connector Dell Dimension 4600CAbbreviations and Acronyms Contents Program is designed for an earlier Microsoft Windows Mail, Modem, and Internet ProblemsResolving Software and Hardware Incompatibilities Using Microsoft Windows XP System RestoreAppendix 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 How to clean my computer Tips on using WindowsFinding Information for Your Computer Microsoft Windows License LabelDownloads Drivers, patches, and software updates Answers to technical serviceHow to use Windows XP Support questionsSetting Up and Using Your Computer Connecting the AC Adapter Japan onlyScrew Tabs Tab holes Setting Up and Using Your ComputerAttaching and Removing the Computer Stand Setting Up a Printer Parallel connector on computer Connecting a Parallel PrinterPrinter Cable Screws Clips Parallel printer Cable NotchesUSB connector on computer Connecting a USB PrinterSetting Up a Home and Office Network Connecting an Ieee 1394 Device OptionalConnecting to a Network Adapter Ieee 1394 connector Ieee 1394 cableNetwork cable Network Setup WizardSetting Up Your Internet Connection Connecting to the InternetCopying CDs and DVDs How to Copy a CD or DVDHelpful Tips Using Blank CD-Rs and CD-RWsHyper-Threading Turning Off Your Computer Booting to a USB DeviceSetting Up and Using Your Computer Solving Problems Finding SolutionsW . d e l l . c o m s u p p o r t . d e l l . c o m See Finding Help Information Battery ProblemsProblems writing to a CD-RW drive Drive ProblemsCD drive problems Hard drive problems Mail, Modem, and Internet ProblemsDVD drive problems Solving Problems Operating System not Found Contact Dell see Error MessagesComputer stops responding General ProblemsProgram stops responding Program crashes repeatedlySolid blue screen appears Other software problemsGeneral hardware problems Other technical problemsKeyboard Problems Ieee 1394 Device ProblemsMouse Problems Link activity light Network ProblemsPC Card Problems Power Problems Printer Problems Scanner Problems No sound from speakers Sound and Speaker ProblemsIf the screen is blank Video and Monitor ProblemsNo sound from headphones If the screen is difficult to read Solving Problems Advanced Troubleshooting Diagnostic LightsLight Pattern Problem Description Suggested Resolution Modules, reinstall one module Modules installed, removeNormally, reinstall an additional Identified a faulty module orIf the problem persists or Remove the card and reinstall itIf the computer has a video card See page 66, and restartDell Diagnostics Option Function Starting the Dell DiagnosticsDrivers What Is a Driver?Identifying Drivers Tab FunctionRestoring Your Operating System Reinstalling DriversRestoring the Computer to an Earlier Operating State Using Microsoft Windows XP System RestoreUsing Dell PC Restore by Symantec Resolving Software and Hardware Incompatibilities Enabling System RestoreAdding Parts Front and Back View of the ComputerFront View Instead, perform an operating system shutdown Unexpectedly restartMore information Back View Network jack Modem jack Reattaching the Front Door Front door Opening the Computer CoverHinge arms Closed position Back of computer Adding Parts Cable security tabLooking Inside Your Computer System Board PC Card Types Adding PC Cards OptionalInstalling a PC Card Removing a PC Card Adding Other Cards Adding or Replacing a Video Card Hinged lever Filler bracket Notch Lever Tab card clip AGP connector PCI connectorRemoving a Video Card DDR Memory Overview Installing a Video CardAdding Memory Installing Memory Notch Memory module Cutouts Crossbar Securing clips ConnectorRemoving Memory Closing the Computer Cover Microprocessor SpecificationsSystem Information Expansion BusMemory Ports and ConnectorsDrives VideoAudio PowerNetwork Controls and Lights914 m 3000 ft EnvironmentalIs 914 m 3000 ft Standard Settings System Setup Screens Clearing Forgotten PasswordsViewing Settings Replacing the Battery Battery Definition of Third-Party Software and Peripherals Definition of Dell-Installed Software and PeripheralsDell Technical Support Policy U.S. Only Class a Class B FCC Notices U.S. OnlyFCC Identification Information Contacting DellAppendix 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 101 Index102 Index IndexIndex 103 Index 104