If the screen is difficult to read | Dell H7228 instruction

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

41

Image 41

Dell H7228 manual If the screen is difficult to read

Contents

USB 2.0 connectors Ieee 1394 connector Dell Dimension 4600C Abbreviations and Acronyms Contents Program is designed for an earlier Microsoft Windows Mail, Modem, and Internet Problems Resolving Software and Hardware Incompatibilities Using Microsoft Windows XP System Restore Appendix Safety Instructions Safety Instructions W . 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 Label Downloads Drivers, patches, and software updates Answers to technical serviceHow to use Windows XP Support questions Setting Up and Using Your Computer Connecting the AC Adapter Japan only Screw 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 Notches USB connector on computer Connecting a USB Printer Setting Up a Home and Office Network Connecting an Ieee 1394 Device OptionalConnecting to a Network Adapter Ieee 1394 connector Ieee 1394 cable Network cable Network Setup Wizard Setting Up Your Internet Connection Connecting to the Internet Copying CDs and DVDs How to Copy a CD or DVD Helpful Tips Using Blank CD-Rs and CD-RWsHyper-Threading Turning Off Your Computer Booting to a USB Device Setting Up and Using Your Computer Solving Problems Finding Solutions W . 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 Problems Problems 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 Messages Computer stops responding General ProblemsProgram stops responding Program crashes repeatedly Solid blue screen appears Other software problems General hardware problems Other technical problems Keyboard Problems Ieee 1394 Device Problems Mouse Problems Link activity light Network ProblemsPC Card Problems Power Problems Printer Problems Scanner Problems No sound from speakers Sound and Speaker Problems If 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 or If the problem persists or Remove the card and reinstall itIf the computer has a video card See page 66, and restart Dell Diagnostics Option Function Starting the Dell Diagnostics Drivers What Is a Driver?Identifying Drivers Tab Function Restoring Your Operating System Reinstalling Drivers Restoring the Computer to an Earlier Operating State Using Microsoft Windows XP System Restore Using Dell PC Restore by Symantec Resolving Software and Hardware Incompatibilities Enabling System Restore Adding 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 tab Looking Inside Your Computer System Board PC Card Types Adding PC Cards Optional Installing 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 Connector Removing Memory Closing the Computer Cover Microprocessor SpecificationsSystem Information Expansion Bus Memory Ports and ConnectorsDrives Video Audio PowerNetwork Controls and Lights 914 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. Only FCC Identification Information Contacting Dell Appendix 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 Index 102 Index Index Index 103 Index 104