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Dell UY691 If the display is difficult to read, If only part of the display is readable

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92 Troubleshooting

If the display is difficult to read

ADJUST THE BRIGHTNESS —Press <Fn> and the up- or down-arrow key.

MOVE THE EXTERNAL SUBWOOFER AWAY FROM THE COMPUTER OR MONITOR —If your external speaker system

includes a subwoofer, ensure that the subwoofer is at least 60cm (2 ft) away from the computer or external monitor.

ELIMINATE POSSIBLE INTERFERENCE —Turn off nearby fans, fluorescent lights, halogen lamps, or other

appliances.

ROTATE THE COMPUTER TO FACE A DIFFERENT DIRECTION —Eliminate sunlight glare, which can cause poor

picture quality.

ADJUST THE WINDOWS DISPLAY SETTINGS —

1

Click

Start

→

Control Panel

→

Appearance and Themes

.

2

Click the area you want to change or click the

Display

icon.

3

Try different settings for

Color quality

and

Screen resolution

.

RUN THE VIDEO DIAGNOSTICS TESTS —If no error message appears and you still have a display problem, but the

display is not completely blank, run the Video device group in the Dell Diagnostics (see "Dell Diagnostics" on

page73). Then

contact Dell (see

"Contacting Dell" on page143

).

SEE "ERROR MESSAGES"—If an error message appears, see "Error Messages" on page 80.

If only part of the display is readable

CONNECT AN EXTERNAL MONITOR —

1

Shut down your computer and connect an external monitor to the computer.

2

Turn on the computer and the monitor and adjust the monitor brightness and contrast controls.

If the external monitor works, the computer display or video controller may be defective.

Contact Dell

(see

"Contacting Dell" on page143

).

Contents

Main Notes, Notices, and Cautions Abbreviations and Acronyms Contents 1 Finding Information 2 About Your Computer 3 Using a Battery 4 Using the Keyboard 5 Using Multimedia 6 Using the Display 7 Setting Up and Using Networks 8Using Cards 9 Securing Your Computer 10 Troubleshooting Page 11 System Setup Program 12 Traveling With Your Computer 13 Reinstalling Software 14 Adding and Replacing Parts 15 Dell QuickSet 16 Specifications 17 Getting Help 18 Appendix Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 Finding Information NOTE: 12 NOTE: Page About Your Computer Front View 16 NOTE: Page Left Side View 20 Right Side View 22 Back View Page Page Bottom View Transferring Information to a New Computer Running the Files and Settings Transfer Wizard With the Operating System CD Running the Files and Settings Transfer Wizard Without the Operating System CD Page Using a Battery Battery Performance Checking the Battery Charge Dell QuickSet Battery Meter Microsoft Windows Power Meter Charge Gauge Low-Battery Warning Conserving Battery Power Power Management Modes Standby Mode Hibernate Mode Configuring Power Management Settings Charging the Battery Replacing the Battery Storing a Battery Using the Keyboard 36 Battery Display Functions Power Management Microsoft Windows Logo Key Functions Touch Pad Customizing the Touch Pad and Track Stick Changing the Track Stick Cap Page Page Using Multimedia Playing CDs or DVDs Adjusting the Volume Volume Control Window Volume Control Buttons Adjusting the Picture Using the Display Adjusting Brightness Switching the Video Image From Your Computer Display to a Projector Page Using an External Monitor Simultaneously as an Extension of Your Computer Display Using an External Monitor as Your Primary Display: Swapping Primary and Secondary Displays Using the Ambient Light Sensor Page Page Setting Up and Using Networks Connecting a Network or Broadband Modem Cable Setting Up a Network in Microsoft Windows XP Setting Up a Network in Microsoft Windows Vista Wireless Local Area Network (WLAN) What You Need to Establish a WLAN Connection Checking Your Wireless Network Card Setting Up a New WLAN Using a Wireless Router and a Broadband Modem Connecting to a WLAN Monitoring the Status of Wireless Network Connections Through Dell QuickSet Mobile Broadband or Wireless Wide Area Network (WWAN) What You Need to Establish a Mobile Broadband Network Connection Checking Your Mobile Broadband Card Connecting to a Mobile Broadband Network Enabling/Disabling the Dell Mobile Broadband Network Card Managing Your Network Settings Through the Dell QuickSet Location Profiler Dell Wi-Fi Catcher Network Locator Internet Connection Firewall Page Page Using Cards Card Types Card Blanks Extended Cards Installing a PC Card or ExpressCard PC Card ExpressCard Removing a Card or Blank Page Securing Your Computer Security Cable Lock Smart Cards About Smart Cards Installing a Smart Card Passwords Using a Primary/System Password Using an Administrator Password Using a Hard Drive Password Trusted Platform Module (TPM) Enabling the TPM Feature Security Management Software Computer Tracking Software If Your Computer Is Lost or Stolen Page Page Troubleshooting Diagnostic Lights Diagnostic Light Codes During POST Page Dell Technical Update Service Dell Diagnostics When to Use the Dell Diagnostics Starting the Dell Diagnostics From Your Hard Drive Starting the Dell Diagnostics From the Drivers and Utilities CD Dell Diagnostics Main Menu Page Dell Support Utility Accessing the Dell Support Utility Clicking the Dell Support Icon Double-Clicking the Dell Support Icon Drive Problems CD and DVD drive problems Hard drive problems E-Mail, Modem, and Internet Problems 80 Error Messages ( Fill out the Diagnostics Checklist (see "Diagnostics Checklist" on page143) as you complete these ). Page 82 Add or Remove Programs Change/Remove or Remove IEEE 1394 Device Problems Keyboard Problems External keyboard problems Unexpected characters Lockups and Software Problems The computer does not start up The computer stops responding A program stops responding or crashes repeatedly A program is designed for an earlier Microsoft Windows operating system A solid blue screen appears Memory Problems Fill out the Diagnostics Checklist (see "Diagnostics Checklist" on page143) as you complete these Dell Diagnostics (see "Dell Diagnostics" on page73). IF YOU EXPERIENCE OTHER MEMORY PROBLEMS Network Problems General PC Card or ExpressCard Problems Contact Dell (see ). Power Problems Fill out the Diagnostics Checklist (see "Diagnostics Checklist" on page143) as you complete these Ensuring Sufficient Power for Your Computer Docking Power Considerations Printer Problems Scanner Problems 90 Sound and Speaker Problems Try adjusting the settings. Mouse Printers and Other Hardware Video and Display Problems Fill out the Diagnostics Checklist (see "Diagnostics Checklist" on page143) as you complete these If the display is blank If the display is difficult to read If only part of the display is readable System Setup Program Overview Viewing the System Setup Screens System Setup Screens Commonly Used Settings Changing the Boot Sequence Changing COM Ports Page Traveling With Your Computer Identifying Your Computer Packing the Computer Travel Tips Traveling by Air Reinstalling Software Drivers What Is a Driver? Identifying Drivers Reinstalling Drivers and Utilities Page Using the Hardware Troubleshooter Tool in Microsoft Windows XP and Windows Vista Operating Systems Restoring Your Operating System Using Microsoft Windows System Restore Using the Operating System CD Page Page Adding and Replacing Parts Before You Begin Recommended Tools Turning Off Your Computer Before Working Inside Your Computer Hard Drive Page Returning a Hard Drive to Dell Media Bay Removing the Device Security Screw Removing and Installing Media Bay Devices Hinge Cover Keyboard Page Memory Page Page Page Subscriber Identity Module (SIM) Card Wireless Cards Wireless Local Area Network (WLAN) Cards Page Mobile Broadband or Wireless Wide Area Network (WWAN) Cards FCM (Flash Cache Module) Page Internal Card With Bluetooth Wireless Technology Coin-Cell Battery Page Page Dell QuickSet Page Specifications Page Page Page Page Page Page Page Getting Help Obtaining Assistance Technical Support and Customer Service DellConnect Online Services AutoTech Service Automated Order-Status Service Problems With Your Order Product Information Returning Items for Warranty Repair or Credit Before You Call Contacting Dell For customers in the United States, call 800-WWW-DELL (800-999-3355). Page Appendix Cleaning Your Computer Computer, Keyboard, and Display Touch Pad Mouse Floppy Drive CDs and DVDs Macrovision Product Notice FCC Notice (U.S. Only) FCC Class B Page Glossary A B C D E F G H I K L M N O P R S T U V W X Z