Dell Latitude D520: Troubleshooting
Troubleshooting : Dell Latitude D520
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Troubleshooting
Dell™Latitude™D520User'sGuide
Dell Technical Update Service
The Dell Technical Update service provides proactive e-mail notification of software and hardware updates for your computer. The service is free and can be
customized for content, format, and how frequently you receive notifications.
To enroll for the Dell Technical Update service, go to support.dell.com/technicalupdate.
Dell Diagnostics
When to Use the Dell Diagnostics
If you experience a problem with your computer, perform the checks in Lockups and Software Problems and run the Dell Diagnostics before you contact Dell for
technical assistance.
It is recommended that you print these procedures before you begin.
Start the Dell Diagnostics from either your hard drive or from the optional Drivers and Utilities CD (also known as the ResourceCD).
Starting the Dell Diagnostics From Your Hard Drive
The Dell Diagnostics is located on a hidden diagnostic utility partition on your hard drive.
1. Shut down the computer.
2. If the computer is connected to a docking device (docked), undock it. See the documentation that came with your docking device for instructions.
3. Connect the computer to an electrical outlet.
4. The Dell Diagnostics can be invoked in one of two ways:
l Turnonthecomputer.WhentheDELL™logoappears,press<F12>immediately.SelectDiagnostics from the boot menu and press <Enter>.
l Press and hold the <Fn> key while powering the computer on.
The computer runs the Pre-boot System Assessment, a series of initial tests of your system board, keyboard, hard drive, and display.
Dell Technical Update Service
Dell Diagnostics
Dell Support Utility
Drive Problems
E-Mail, Modem, and Internet Problems
Error Messages
IEEE 1394 Device Problems
Keyboard Problems
Lockups and Software Problems
Memory Problems
Network Problems
PC Card or ExpressCard Problems
Power Problems
Printer Problems
Scanner Problems
Sound and Speaker Problems
Touch Pad or Mouse Problems
Video and Display Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: TheDellDiagnosticsworksonlyonDell™computers.
NOTE: The Drivers and Utilities CD is optional and may not ship with your computer.
NOTE: If your computer cannot display a screen image, contact Dell (see Contacting Dell).
NOTE: If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft®Windows®desktop. Then shut
down your computer and try again.
NOTE: If you see a message stating that no diagnostics utility partition has been found, run the Dell Diagnostics from the optional Drivers and
Utilities CD.
l During the assessment, answer any questions that appear.
l If a failure is detected, the computer stops and beeps. To stop the assessment and restart the computer, press <Esc>; to continue to the next
test, press <y>; to retest the component that failed, press <r>.
l If failures are detected during the Pre-boot System Assessment, write down the error code(s) and contact Dell (see Contacting Dell).
If the Pre-boot System Assessment completes successfully, you receive the message Booting Dell Diagnostic Utility Partition. Press any key to
continue.
5. PressanykeytostarttheDellDiagnosticsfromthediagnosticsutilitypartitiononyourharddrive.
Starting the Dell Diagnostics From the Optional Drivers and Utilities CD
1. Insert the Drivers and Utilities CD.
2. Shut down and restart the computer.
When the DELL logo appears, press <F12> immediately.
If you wait too long and the Windows logo appears, continue to wait until you see the Windows desktop. Then shut down your computer and try again.
3. When the boot device list appears, highlight CD/DVD/CD-RW Drive and press <Enter>.
4. Select the Boot from CD-ROM option from the menu that appears and press <Enter>.
5. Type 1 to start the menu and press <Enter> to proceed.
6. Select Run the 32 Bit Dell Diagnostics from the numbered list. If multiple versions are listed, select the version appropriate for your computer.
7. When the Dell Diagnostics Main Menu appears, select the test that you want to run.
Dell Diagnostics Main Menu
1. After the Dell Diagnostics loads and the Main Menu screen appears, click the button for the option you want.
2. If a problem is encountered during a test, a message appears with an error code and a description of the problem. Write down the error code and
problem description and follow the instructions on the screen.
If you cannot resolve the error condition, contact Dell (see Contacting Dell).
3. If you run a test from the Custom Test or Symptom Tree option, click the applicable tab described in the following table for more information.
NOTE: The next steps change the boot sequence for one time only. On the next start-up, the computer boots according to the devices specified in
the system setup program.
Option
Function
Express Test
Performs a quick test of devices. The test typically takes 10 to 20 minutes and requires no interaction on your part. Run Express Test first to
increase the possibility of tracing the problem quickly.
Extended
Test
Performs a thorough check of devices. The test typically takes 1 hour or more and requires you to answer questions periodically
Custom Test
Tests a specific device. You can customize the tests you want to run.
Symptom
Tree
Lists the most common symptoms encountered and allows you to select a test based on the symptom of the problem you are having.
NOTE: The Service Tag for your computer is located at the top of each test screen. If you contact Dell, technical support will ask for your Service
Tag.
Tab
Function
Results
Displays the results of the test and any error conditions encountered.
Errors
Displays error conditions encountered, error codes, and the problem description.
Help
Describes the test and may indicate requirements for running the test.
Configuration
Displays your hardware configuration for the selected device.
4. When the tests are completed, if you are running the Dell Diagnostics from the Drivers and Utilities CD, remove the CD.
5. When the tests are complete, close the test screen to return to the Main Menu screen. To exit the Dell Diagnostics and restart the computer, close the
Main Menu screen.
Dell Support Utility
The Dell Support Utility is installed on your computer and available from the Dell Support, , icon on the taskbar or from the Start button. Use this support
utility for self-support information, software updates, and health scans of your computing environment.
Accessing the Dell Support Utility
Access the Dell Support Utility from the icon on the taskbar or from the Start menu.
If the Dell Support icon does not appear in your taskbar:
1. Click Start® All Programs® Dell Support® Dell Support Settings.
2. Ensure that the Show icon on the taskbar option is checked.
The Dell Support Utility is customized for your computing environment.
The icon in the taskbar functions differently when you click, double-click, or right-click the icon.
Clicking the Dell Support Icon
Click or right-click the icon to perform the following tasks:
l Check your computing environment.
l View the Dell Support Utility settings.
l Access the help file for the Dell Support Utility.
l View frequently asked questions.
l Learn more about the Dell Support Utility.
l Turn the Dell Support Utility off.
Double-Clicking the Dell Support Icon
Double-click the icon to manually check your computing environment, view frequently asked questions, access the help file for the Dell Support Utility, and
view Dell Support settings.
For more information about the Dell Support Utility, click the question mark (?) at the top of the Dell™ Support screen.
Drive Problems
Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you complete these checks.
Ensure that Microsoft®Windows®recognizes the drive — Click the Start button and click My Computer. If the floppy, CD, or DVD drive, is not listed,
The Dell Diagnostics obtains configuration information for all devices from system setup, memory, and various internal tests, and it displays
the information in the device list in the left pane of the screen. The device list may not display the names of all the components installed on
your computer or all devices attached to your computer.
Parameters
Allows you to customize the test by changing the test settings.
NOTE: If the Dell Support Utility is not available from the Start menu, go to support.dell.com and download the software.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
perform a full scan with your antivirus software to check for and remove viruses. Viruses can sometimes prevent Windows from recognizing the drive.
Test the drive —
l Insert another floppy disk, CD, or DVD to eliminate the possibility that the original one is defective.
l Insert a bootable floppy disk and restart the computer.
Clean the drive or disk — See Cleaning Your Computer.
Ensure that the CD is snapped onto the spindle
Check the cable connections
Check for hardware incompatibilities — See Software and Hardware Incompatibilities.
Run the Dell Diagnostics — See Dell Diagnostics.
CD and DVD drive problems
Problems writing to a CD/DVD-RW drive
Close other programs — The CD/DVD-RW drive must receive a steady stream of data when writing. If the stream is interrupted, an error occurs. Try closing all
programs before you write to the CD/DVD-RW.
Turn off Standby mode in Windows before writing to a CD/DVD-RW disc — See Standby Mode or search for the keyword standby in the Windows Help and
Support Center for information on power management modes.
Change the write speed to a slower rate — See the help files for your CD or DVD creation software.
If you cannot eject the CD, CD-RW, DVD, or DVD+RW drive tray
1. Ensure that the computer is turned off.
2. Straighten a paper clip and insert one end into the eject hole at the front of the drive; push firmly until the tray is partially ejected.
3. Gently pull out the tray until it stops.
If you hear an unfamiliar scraping or grinding sound
l Ensure that the sound is not caused by the program that is running.
l Ensure that the disk or disc is inserted properly.
Hard drive problems
Allow the computer to cool before turning it on — A hot hard drive may prevent the operating system from starting. Try allowing the computer to return to
room temperature before turning it on.
Run Check Disk —
1. Click Start® My Computer.
2. Right-click Local Disk C:.
3. Click Properties® Tools® Check Now.
4. Click Scan for and attempt recovery of bad sectors® Start.
NOTE: High-speed CD or DVD drive vibration is normal and may cause noise, which does not indicate a defect in the drive or the CD or DVD.
NOTE: Because of different regions worldwide and different disc formats, not all DVD titles work in all DVD drives.
E-Mail, Modem, and Internet Problems
Check the Microsoft Outlook®Express Security Settings — If you cannot open your e-mail attachments:
1. In Outlook Express, click Tools® Options® Security.
2. Click Do not allow attachments to remove the checkmark.
Check the telephone line connection —
Check the telephone connector —
Connect the modem directly to the telephone wall connector —
Use a different telephone line —
l Verify that the telephone line is connected to the connector on the modem. (The connector has either a green label or a connector-shaped icon next to
it.)
l Ensure that you insert the telephone line connector into the modem until it clicks.
l Disconnect the telephone line from the modem and connect it to a telephone. Listen for a dial tone.
l If you have other telephone devices sharing the line, such as an answering machine, fax machine, surge protector, or line splitter, bypass the devices
andconnectthemodemdirectlytothetelephonewallconnector.Ifyouareusingalinethatis3m(10ft)ormoreinlength,tryashorterone.
Run the Modem Helper diagnostics — Click the Start button, point to All Programs and then click Modem Helper. Follow the instructions on the screen to
identify and resolve modem problems. (Modem Helper is not available on all computers.)
Verify that the modem is communicating with Windows —
1. Click Start® Control Panel® Printers and Other Hardware® Phone and Modem Options® Modems.
2. Click the COM port for your modem® Properties® Diagnostics® Query Modem to verify that the modem is communicating with Windows.
3. If all commands receive responses, the modem is operating properly.
Ensure that you are connected to the Internet — Ensure that you have subscribed to an Internet provider. With the Outlook Express e-mail program open,
click File. If Work Offline has a checkmark next to it, click the checkmark to remove it and connect to the Internet. For help, contact your Internet service
provider.
Scan the computer for spyware — If you are experiencing slow computer performance, you frequently receive pop-up advertisements, or you are having
problems connecting to the Internet, your computer might be infected with spyware. Use an anti-virus program that includes anti-spyware protection (your
program may require an upgrade) to scan the computer and remove spyware. For more information, go to support.dell.com and search for the keyword
spyware.
Error Messages
Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you complete these checks.
If the message is not listed, see the documentation for the operating system or the program that was running when the message appeared.
Auxiliary device failure — The touch pad or external mouse may be faulty. For an external mouse, check the cable connection. Enable the Pointing Device
option in the system setup program. If the problem persists, contact Dell (see Contacting Dell).
Bad command or file name — Ensure that you have spelled the command correctly, put spaces in the proper place, and used the correct pathname.
Cache disabled due to failure — The primary cache internal to the microprocessor has failed. Contact Dell (see Contacting Dell).
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: Connect the modem to an analog telephone connector only. The modem does not operate while it is connected to a digital telephone network.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CD drive controller failure —
The CD drive does not respond to commands from the computer (see Dell Support Utility).
Data error — The hard drive cannot read the data (see Dell Support Utility).
Decreasing available memory — One or more memory modules may be faulty or improperly seated. Reinstall the memory modules and, if necessary, replace
them (see Memory).
Disk C: failed initialization — The hard drive failed initialization. Run the hard drive tests in the Dell Diagnostics (see Dell Diagnostics).
Drive not ready — The operation requires a hard drive in the bay before it can continue. Install a hard drive in the hard drive bay (see Hard Drive).
Error reading PCMCIA card — The computer cannot identify the PC Card or ExpressCard. Reinsert the card or try another card (see Using Cards).
Extended memory size has changed — The amount of memory recorded in NVRAM does not match the memory installed in the computer. Restart the
computer. If the error appears again, contact Dell (see Contacting Dell).
The file being copied is too large for the destination drive — The file that you are trying to copy is too large to fit on the disk, or the disk is too full. Try
copying the file to a different disk or use a larger capacity disk.
A filename cannot contain any of the following characters: \ / : * ? " < > | — Do not use these characters in filenames.
Gate A20 failure — A memory module may be loose. Reinstall the memory modules and, if necessary, replace them (see Memory).
General failure — The operating system is unable to carry out the command. The message is usually followed by specific information—for example, Printer
out of paper. Take the appropriate action.
Hard-disk drive configuration error — The computer cannot identify the drive type. Shut down the computer, remove the hard drive (see Hard Drive), and
boot the computer from a CD. Then shut down the computer, reinstall the hard drive, and restart the computer. Run the Hard-Disk Drive tests in the Dell
Diagnostics (see Dell Diagnostics).
Hard-disk drive controller failure 0 — The hard drive does not respond to commands from the computer. Shut down the computer, remove the hard drive
(see Hard Drive), and boot the computer from a CD. Then shut down the computer, reinstall the hard drive, and restart the computer. If the problem persists,
try another drive. Run the Hard-Disk Drive tests in the Dell Diagnostics (see Dell Diagnostics).
Hard-disk drive failure — The hard drive does not respond to commands from the computer. Shut down the computer, remove the hard drive (see Hard
Drive), and boot the computer from a CD. Then shut down the computer, reinstall the hard drive, and restart the computer. If the problem persists, try another
drive. Run the Hard-Disk Drive tests in the Dell Diagnostics (see Dell Diagnostics).
Hard-disk drive read failure — The hard drive may be defective. Shut down the computer, remove the hard drive (see Hard Drive), and boot the computer
from a CD. Then shut down the computer, reinstall the hard drive, and restart the computer. If the problem persists, try another drive. Run the Hard-Disk Drive
tests in the Dell Diagnostics (see Dell Diagnostics).
Insert bootable media — The operating system is trying to boot to a nonbootable CD. Insert a bootable CD.
Invalid configuration information-please run system setup program — The system configuration information does not match the hardware configuration.
The message is most likely to occur after a memory module is installed. Correct the appropriate options in the system setup program (see System Setup
Program).
Keyboard clock line failure — For external keyboards, check the cable connection. Run the Keyboard Controller test in the Dell Diagnostics (see Dell
Diagnostics).
Keyboard controller failure — For external keyboards, check the cable connection. Restart the computer, and avoid touching the keyboard or the mouse
during the boot routine. Run the Keyboard Controller test in the Dell Diagnostics (see Dell Diagnostics).
Keyboard data line failure — For external keyboards, check the cable connection. Run the Keyboard Controller test in the Dell Diagnostics (see Dell
Diagnostics).
Keyboard stuck key failure — For external keyboards or keypads, check the cable connection. Restart the computer, and avoid touching the keyboard or keys
during the boot routine. Run the Stuck Key test in the Dell Diagnostics (see Dell Diagnostics).
Memory address line failure at address, read value expecting value — A memory module may be faulty or improperly seated. Reinstall the memory modules
and, if necessary, replace them (see Memory).
Memory allocation error — The software you are attempting to run is conflicting with the operating system, another program, or a utility. Shut down the
computer, wait 30 seconds, and then restart it. Try to run the program again. If the error message still appears, see the software documentation.
Memory data line failure at address, read value expecting value — A memory module may be faulty or improperly seated. Reinstall the memory modules
(see Memory) and, if necessary, replace them.
Memory double word logic failure at address, read value expecting value — A memory module may be faulty or improperly seated. Reinstall the memory
modules (see Memory) and, if necessary, replace them.
Memory odd/even logic failure at address, read value expecting value — A memory module may be faulty or improperly seated. Reinstall the memory
modules (see Memory) and, if necessary, replace them.
Memory write/read failure at address, read value expecting value — A memory module may be faulty or improperly seated. Reinstall the memory modules
(see Memory) and, if necessary, replace them.
No boot device available — The computer cannot find the hard drive. If the hard drive is your boot device, ensure that the drive is installed, properly seated,
and partitioned as a boot device.
No boot sector on hard drive — The operating system may be corrupted. Contact Dell (see Contacting Dell).
No timer tick interrupt — A chip on the system board may be malfunctioning. Run the System Set tests in the Dell Diagnostics (see Dell Diagnostics).
Not enough memory or resources. Exit some programs and try again — You have too many programs open. Close all windows and open the program that
you want to use.
Operating system not found — Reinstall the hard drive (see Hard Drive). If the problem persists, contact Dell (see Contacting Dell).
Optional ROM bad checksum — The optional ROM apparently failed. Contact Dell (see Contacting Dell).
A required .DLL file was not found — The program that you are trying to open is missing an essential file. Remove and then reinstall the program.
1. Click Start® Control Panel® Add or Remove Programs.
2. Select the program you want to remove.
3. Click Remove or Change/Remove and follow the prompts on the screen.
4. See the program documentation for installation instructions.
Sector not found — The operating system cannot locate a sector on the hard drive. You may have a defective sector or corrupted FAT on the hard drive. Run
the Windows error-checking utility to check the file structure on the hard drive. See the Help and Support Center for instructions. To access the Help and
Support Center, see Windows Help and Support Center. If a large number of sectors are defective, back up the data (if possible), and then reformat the hard
drive.
Seek error — The operating system cannot find a specific track on the hard drive.
Shutdown failure — A chip on the system board may be malfunctioning. Run the System Set tests in the Dell Diagnostics (see Dell Diagnostics).
Time-of-day clock lost power — System configuration settings are corrupted. Connect your computer to an electrical outlet to charge the battery. If the
problem persists, try to restore the data by entering the system setup program. Then immediately exit the program. If the message reappears, contact Dell
(see Contacting Dell).
Time-of-day clock stopped — The reserve battery that supports the system configuration settings may require recharging. Connect your computer to an
electrical outlet to charge the battery. If the problem persists, contact Dell (see Contacting Dell).
Time-of-day not set-please run the System Setup program — The time or date stored in the system setup program does not match the system clock. Correct
the settings for the Date and Time options (see System Setup Program).
Timer chip counter 2 failed — A chip on the system board may be malfunctioning. Run the System Set tests in the Dell Diagnostics (see Dell Diagnostics).
Unexpected interrupt in protected mode — The keyboard controller may be malfunctioning, or a memory module may be loose. Run the System Memory tests
and the Keyboard Controller test in the Dell Diagnostics (see Dell Diagnostics).
x:\ is not accessible. The device is not ready — Insert a disk into the drive and try again.
Warning: Battery is critically low — The battery is running out of charge. Replace the battery, or connect the computer to an electrical outlet. Otherwise,
activate hibernate mode or shut down the computer.
IEEE 1394 Device Problems
Ensure that the IEEE 1394 device is recognized by Windows —
Click Start® Control Panel® Printers and Other Hardware. If your IEEE 1394 device is listed, Windows recognizes the device.
If you have problems with an IEEE 1394 device —
If the device was provided by Dell, contact Dell (see Contacting Dell). If the device was provided by a different manufacturer, contact that manufacturer.
Ensure that the IEEE 1394 device is properly inserted into the connector
Keyboard Problems
Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you perform the various checks.
External Keyboard problems
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: Use the integrated keyboard when running the Dell Diagnostics or the system setup program. When you attach an external keyboard, the
integrated keyboard remains fully functional.
NOTE: When you attach an external keyboard, the integrated keyboard remains fully functional.
Check the keyboard cable — Shut down the computer. Disconnect the keyboard cable and check it for damage, and firmly reconnect the cable.
If you are using a keyboard extension cable, disconnect it and connect the keyboard directly to the computer.
Check the external keyboard —
1. Shut down the computer, wait 1 minute, and turn it on again.
2. Verify that the numbers, capitals, and scroll lock lights on the keyboard blink during the boot routine.
3. From the Windows desktop, click Start® All Programs® Accessories® Notepad.
4. Type some characters on the external keyboard and verify that they appear on the display.
If you cannot verify these steps, you may have a defective external keyboard.
To verify that the problem is with the external keyboard, check the integrated keyboard —
1. Shut down the computer.
2. Disconnect the external keyboard.
3. Turn on the computer.
4. From the Windows desktop, click Start® All Programs® Accessories® Notepad.
5. Type some characters on the internal keyboard and verify that they appear on the display.
If the characters appear now but did not with the external keyboard, you may have a defective external keyboard. Contact Dell (see Contacting Dell).
Run the keyboard diagnostics tests — Run the PC-AT Compatible Keyboards tests in the Dell Diagnostics (see Dell Diagnostics). If the tests indicate a
defective external keyboard, contact Dell (see Contacting Dell).
Unexpected characters
Disable the numeric keypad — Press <Num Lk> to disable the numeric keypad if numbers are displayed instead of letters. Verify that the numbers lock light is
not lit.
Lockups and Software Problems
The computer does not start up
Ensure that the AC adapter is firmly connected to the computer and to the electrical outlet.
The computer stops responding
Turn the computer off — If you are unable to get a response by pressing a key on your keyboard or moving your mouse, press and hold the power button for
at least 8 to 10 seconds until the computer turns off. Then restart your computer.
A program stops responding or crashes repeatedly
End the program —
1. Press <Ctrl><Shift><Esc> simultaneously.
2. Click Task Manager.
3. Click Applications.
4. Click the program that is no longer responding.
5. Click End Task.
Check the software documentation — If necessary, uninstall and then reinstall the program.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: You might lose data if you are unable to perform an operating system shutdown.
NOTE: Software usually includes installation instructions in its documentation or on a floppy disk or CD.
A program is designed for an earlier Microsoft®Windows® operating system
Run the Program Compatibility Wizard — The Program Compatibility Wizard configures a program so it runs in an environment similar to non-Windows XP
operating system environments.
1. Click Start® All Programs® Accessories® Program Compatibility Wizard® Next.
2. Follow the instructions on the screen.
A solid blue screen appears
Turn the computer off — If you are unable to get a response by pressing a key on your keyboard or moving your mouse, press and hold the power button for
at least 8 to 10 seconds until the computer turns off. Then restart your computer.
Other software problems
Check the software documentation or contact the software manufacturer for troubleshooting information —
l Ensure that the program is compatible with the operating system installed on your computer.
l Ensure that your computer meets the minimum hardware requirements needed to run the software. See the software documentation for information.
l Ensure that the program is installed and configured properly.
l Verify that the device drivers do not conflict with the program.
l If necessary, uninstall and then reinstall the program.
Back up your files immediately
Use a virus-scanning program to check the hard drive, floppy disks, or CDs
Save and close any open files or programs and shut down your computer through the Start menu
Scan the computer for spyware — If you are experiencing slow computer performance, you frequently receive pop-up advertisements, or you are having
problems connecting to the Internet, your computer might be infected with spyware. Use an anti-virus program that includes anti-spyware protection (your
program may require an upgrade) to scan the computer and remove spyware. For more information, go to support.dell.com and search for the keyword
spyware.
Run the Dell Diagnostics — See Dell Diagnostics. If all tests run successfully, the error condition is related to a software problem.
Memory Problems
Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you complete these checks.
If you receive an insufficient memory message —
l Save and close any open files and exit any open programs you are not using to see if that resolves the problem.
l See the software documentation for minimum memory requirements. If necessary, install additional memory (see Memory).
l Reseat the memory modules to ensure that your computer is successfully communicating with the memory (see Memory).
l Run the Dell Diagnostics (see Dell Diagnostics).
If you experience other memory problems —
l Reseat the memory modules (see Memory) to ensure that your computer is successfully communicating with the memory.
l Ensure that you are following the memory installation guidelines (see Memory).
l Run the Dell Diagnostics (see Dell Diagnostics).
Network Problems
Fill out the Diagnostics Checklist as you complete these checks.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
General
Check the network cable connector — Ensure that the network cable is firmly inserted into both the network connector on the back of the computer and the
network connector.
Check the network lights on the network connector — No light indicates that no network communication exists. Replace the network cable.
Restart the computer and log on to the network again
Check your network settings — Contact your network administrator or the person who set up your network to verify that your network settings are correct
and that the network is functioning.
Mobile Broadband Network
Cannot connect — The Dell Mobile Broadband Card must be activated on the network in order to connect. Position the mouse over the icon in the
notification area to read the status of the connection. If the status indicates the mobile broadband card is not activated, see Activate your Mobile Broadband
card for more information. If problems persist, contact your Mobile Broadband service carrier for details on your plan.
Check your Mobile Broadband network service — Contact your Mobile Broadband service carrier to verify coverage plan and supported services.
Check the status in the Dell Mobile Broadband Card Utility — Click the icon in the taskbar to launch the utility. Check the status in the main window:
l No card detected – Restart the computer and launch the utility again.
You can turn your computer's wireless networking function on and off by pressing the <Fn><F2> key combination. If the wireless networking function is
turned on, press <Fn><F2> to disable it. If the wireless networking function is turned off, press <Fn><F2> to enable it.
l Wireless Disabled – Press <Fn><F2> or right-click the icon to verify that your wireless network ExpressCard is enabled.
l Searching – The Dell Mobile Broadband Card Utility has not yet located a Mobile Broadband network. If the searching state persists, ensure that the
signal strength is adequate.
l No service – The Dell Mobile Broadband Card Utility did not locate a Mobile Broadband network. Ensure that the signal strength is adequate. Restart
the Dell wireless utility or contact your Mobile Broadband network provider.
l Check your WWAN service – Contact your Mobile Broadband network service provider to verify coverage plan and supported services.
Activate your Mobile Broadband card — Before you connect to the Internet, you must activate the Mobile Broadband service through your cellular service
provider. For instructions and for additional information about using the Dell Mobile Broadband Card Utility, see the user's guide available through the
Windows Help and Support Center. To access the Help and Support Center, see Windows Help and Support Center. The user's guide is also available on the
Dell Support website at support.dell.com and on the CD included with your Mobile Broadband card if you purchased the card separately from your computer.
PC Card or ExpressCard Problems
Check the card — Ensure that the card is properly inserted into the connector. If you are using an ExpressCard, ensure that you insert the card into an
adapter before you insert it into the card slot
Ensure that the card is recognized by Windows — Double-click the Safely Remove Hardware icon in the Windows taskbar. Ensure that the card is listed.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: The Dell Mobile Broadband Card Utility user's guide is located under Help and Support. You can also download the user's guide from
support.dell.com.
NOTE: The icon appears in the notification area if the computer has a Dell Mobile Broadband card installed. Double-click the icon to launch the utility.
NOTE: f you are unable to connect to a wireless network, ensure that you have all the components for establishing a WLAN (see What You Need
to Establish a WLAN Connection), and then verify that your wireless network card is enabled by pressing <Fn><F2>.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
If you have problems with a Dell-provided Card — Contact Dell (see Contacting Dell).
If you have problems with a Card not provided by Dell — Contact the card manufacturer.
Power Problems
Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you complete these checks.
Check the power light — When the power light is lit or blinking, the computer has power. If the power light is blinking, the computer is in standby mode—
press the power button to exit standby mode. If the light is off, press the power button to turn on the computer.
Charge the battery — The battery charge may be depleted.
1. Reinstall the battery.
2. Use the AC adapter to connect the computer to an electrical outlet.
3. Turn on the computer.
Check the battery status light — If the battery status light flashes orange or is a steady orange the battery charge is low or depleted. Connect the computer
to an electrical outlet.
If the battery status light flashes green and orange, the battery is too hot to charge. Shut down the computer, disconnect the computer from the electrical
outlet, and then let the battery and computer cool to room temperature.
If the battery status light rapidly flashes orange, the battery may be defective. Contact Dell (see Contacting Dell).
Check the battery temperature — Ifthebatterytemperatureisbelow0°C(32°F),thecomputerwillnotstartup.
Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Check the AC adapter — Check the AC adapter cable connections. If the AC adapter has a light, ensure that the light is on.
Connect the computer directly to an electrical outlet — Bypass power protection devices, power strips, and the extension cable to verify that the computer
turns on.
Eliminate possible interference — Turn off nearby fans, fluorescent lights, halogen lamps, or other appliances.
Adjust the power properties — See Configuring Power Management Settings.
Reseat the memory modules — If the computer power light turns on but the display remains blank, reinstall the memory modules (see Memory).
Ensuring Sufficient Power for Your Computer
Your computer is designed to use a 65-W or 90-W AC adapter. However, for optimum system performance, you should always use a 90-W adapter.
Using less-powerful AC adapters, including the 65-W AC adapter, will cause you to receive a WARNING message.
Docking Power Considerations
Your computer supports use of a Dell D/Port advanced port replicator. Due to the extra power consumption when a computer is docked to a docking device,
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: Battery operating time (the time the battery can hold a charge) decreases over time. Depending on how often the battery is used and the
conditions under which it is used, you may need to purchase a new battery during the life of your computer.
normal computer operation is not possible on battery power alone. Ensure that the AC adapter is connected to your computer when the computer is docked to
a docking device.
Docking While the Computer Is Running
If your computer is connected to the Dell D/Port while the computer is running, presence of the docking device is ignored until the AC adapter is connected to
the computer.
AC Power Loss While the Computer Is Docked
If your computer loses AC power while docked to the Dell D/Port, the computer immediately goes into low-performance mode.
Printer Problems
Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you complete these checks.
Ensure that the printer is turned on
Check the printer cable connections —
l See the printer documentation for cable connection information.
l Ensure that the printer cables are securely connected to the printer and the computer.
Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Verify that the printer is recognized by Windows —
1. Click Start® Control Panel® Printers and Other Hardware® View installed printers or fax printers.
2. If the printer is listed, right-click the printer icon.
3. Click Properties® Ports. For a parallel printer, ensure that the Print to the following port(s): setting is LPT1 (Printer Port). For a USB printer, ensure
that the Print to the following port(s): setting is USB.
Reinstall the printer driver — See the printer documentation for instructions.
Scanner Problems
Check the scanner documentation — See the scanner documentation for setup and troubleshooting information.
Unlock the scanner — Ensure that your scanner is unlocked if it has a locking tab or button.
Restart the computer and try the scanner again
Check the cable connections —
l See the scanner documentation for cable connection information.
l Ensure that the scanner cables are securely connected to the scanner and the computer.
Verify that the scanner is recognized by Microsoft Windows —
Click Start® Control Panel® Printers and Other Hardware® Scanners and Cameras. If your scanner is listed, Windows recognizes the scanner.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: If you need technical assistance for your printer, contact the printer's manufacturer.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: If you need technical assistance for your scanner, contact the scanner's manufacturer.
Reinstall the scanner driver — See the scanner documentation for instructions.
Sound and Speaker Problems
Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you complete these checks.
No sound from integrated speakers
Adjust the Windows volume control — 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. Adjust the volume, bass, or treble controls to eliminate distortion.
Reinstall the sound (audio) driver — See Reinstalling Drivers and Utilities.
No sound from external speakers
Ensure that the subwoofer and the speakers are turned on — See the setup diagram supplied with the speakers. If your speakers have volume controls,
adjust the volume, bass, or treble to eliminate distortion.
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.
Disconnect headphones from the headphone connector — Sound from the speakers is automatically disabled when headphones are connected to the
computer's front-panel headphone connector.
Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Eliminate possible interference — Turn off nearby fans, fluorescent lights, or halogen lamps to check for interference.
Reinstall the audio driver — See Reinstalling Drivers and Utilities.
Run the Dell Diagnostics — See Dell Diagnostics.
No sound from headphones
Check the headphone cable connection — Ensure that the headphone cable is securely inserted into the headphone connector.
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.
Touch Pad or Mouse Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: The volume control in some MP3 players overrides the Windows volume setting. If you have been listening to MP3 songs, ensure that you did not
turn the player volume down or off.
Check the touch pad settings —
1. Click Start® Control Panel® Printers and Other Hardware® Mouse.
2. Try adjusting the settings.
Check the mouse cable — Shut down the computer. Disconnect the mouse cable, check it for damage, and firmly reconnect the cable.
If you are using a mouse extension cable, disconnect it and connect the mouse directly to the computer.
To verify that the problem is with the mouse, check the touch pad —
1. Shut down the computer.
2. Disconnect the mouse.
3. Turn on the computer.
4. At the Windows
desktop, use the touch pad to move the cursor around, select an icon, and open it.
If the touch pad operates correctly, the mouse may be defective.
Check the system setup program settings — Verify that the system setup program lists the correct device for the pointing device option. (The computer
automatically recognizes a USB mouse without making any setting adjustments.) For more information on using the system setup program, see System Setup
Program.
Test the mouse controller — To test the mouse controller (which affects pointer movement) and the operation of the touch pad or mouse buttons, run the
Mouse test in the Pointing Devices test group in the Dell Diagnostics (see Dell Diagnostics).
Reinstall the touch pad driver — See Reinstalling Drivers and Utilities.
Video and Display Problems
Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you complete these checks.
If the display is blank
Check the battery — If you are using a battery to power your computer, the battery charge may be depleted. Connect the computer to an electrical outlet
using the AC adapter, and turn on the computer.
Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Check the AC adapter — Check the AC adapter cable connections. If the AC adapter has a light, ensure that the light is on.
Connect the computer directly to an electrical outlet — Bypass power protection devices, power strips, and the extension cable to verify that the computer
turns on.
Adjust the power properties — Search for the keyword standby in the Windows Help and Support Center (see Windows Help and Support Center).
Switch the video image — If your computer is attached to an external monitor, press <Fn><F8> to switch the video image to the display.
If the display is difficult to read
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: If you are using a program that requires a higher resolution than your computer supports, it is recommended that you attach an external monitor
to your computer.
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
least60cm(2ft)awayfromthecomputerorexternalmonitor.
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). Then contact Dell (see Contacting Dell).
See "Error Messages" — If an error message appears, see Error Messages.
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).
Back to Contents Page
Оглавление
- Dell™Latitude™D520User'sGuide
- About Your Computer
- Appendix
- Using a Battery
- Using Cards
- Using the Display
- Finding Information
- Glossary
- Getting Help
- Using the Keyboard and Touch Pad
- Using Multimedia
- Setting Up a Network
- Adding and Replacing Parts
- Dell™QuickSet
- Securing Your Computer
- System Setup Program
- Reinstalling Software
- Specifications
- Traveling With Your Computer
- Troubleshooting
