Dell OptiPlex 745 User manual

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
Back to Contents Page
Solving Problems
Dell™OptiPlex™745 User's Guide
Troubleshooting Tips
Battery Problems
Card Problems
Drive Problems
E-Mail, Modem, and Internet Problems
Keyboard Problems
Fan Problems
Lockups and Software Problems
Media Card Reader Problems
Memory Problems
Mouse Problems
Network Problems
Power Problems
Printer Problems
Restoring Default Settings
Serial or Parallel Device Problems
Sound and Speaker Problems
Video and Monitor Problems
Troubleshooting Tips
Follow these tips when you troubleshoot your computer:
●If you added or removed a part before the problem started, review the installation procedures
and ensure that the part is correctly installed.
●If a peripheral device does not work, ensure that the device is properly connected.
●If an error message appears on the screen, write down the exact message. This message may
help technical support personnel diagnose and fix the problem(s).
●If an error message occurs in a program, see the program's documentation.
Battery Problems
Fill out the Diagnostics Checklist as you complete these checks.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (1 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
CAUTION: There is a danger of a new battery exploding if it is incorrectly installed.
Replace the battery only with the same or equivalent type recommended by the
manufacturer. Discard used batteries according to the manufacturer's instructions.
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions in the Product Information Guide.
Replace the battery —If you have to repeatedly reset time and date information after
turning on the computer, or if an incorrect time or date displays during start-up, replace
the battery (see Battery). If the battery still does not work properly, contact Dell (see
Contacting Dell).
Card 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.
CAUTION: To guard against electrical shock, always unplug your computer from the
electrical outlet before opening the cover.
NOTICE: To prevent static damage to components inside your computer, discharge static
electricity from your body before you touch any of your computer's electronic components. You
can do so by touching an unpainted metal surface on the computer.
Check the card seating and cable —
1. Turn off the computer and devices, disconnect them from their electrical outlets,
wait 10 to 20 seconds, and then remove the computer cover (see the appropriate
"Removing the Computer Cover" section).
2. Ensure that each card is firmly seated in its connector. Reseat any loose cards.
3. Ensure that all cables are firmly connected to their corresponding connectors on the
cards. If any cables appear loose, reconnect them.
For instructions on which cables should be attached to specific connectors on a card,
see the card's documentation.
4. Close the computer cover reconnect the computer and devices to electrical outlets,
and then turn them on (see Replacing the Computer Cover).
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (2 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
Test the graphics card —
1. Turn off the computer and devices, disconnect them from their electrical outlets,
wait 10 to 20 seconds, and then remove the computer cover (see the appropriate
"Removing the Computer Cover" section).
2. Remove all cards except the graphics card. See the appropriate "Cards" section for
your computer.
If your primary hard drive is connected to a drive controller card and not to one of
the system board IDE connectors, leave the drive controller card installed in the
computer.
3. Close the computer cover (see Replacing the Computer Cover), reconnect the
computer and devices to electrical outlets, and then turn them on.
4. Run the Dell Diagnostics. See Dell Diagnostics.
Test the cards —
1. Turn off the computer and devices, disconnect them from their electrical outlets,
wait 10 to 20 seconds, and then remove the computer cover (see the appropriate
"Removing the Computer Cover" section for your computer).
2. Reinstall one of the cards that you removed previously. See see appropriate
"Cards" section for your computer.
3. Close the computer cover, reconnect the computer and devices to electrical outlets,
and then turn them on (see Replacing the Computer Cover).
4. Run the Dell Diagnostics. See Dell Diagnostics.
If any of the tests fail, the card you just reinstalled is faulty and needs to be replaced.
5. Repeat this process until you have reinstalled all cards.
Drive Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions in the Product Information Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the
electrical outlet before opening the cover.
NOTICE: To prevent static damage to components inside your computer, discharge static
electricity from your body before you touch any of your computer's electronic components. You
can do so by touching an unpainted metal surface on the computer.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (3 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
Fill out the Diagnostics Checklist as you complete these checks.
Test the drive —
●Insert another floppy disk, CD, or DVD to eliminate the possibility that the original
one is defective.
●Insert bootable media and restart the computer.
Clean the drive or disk —See Cleaning Your Computer.
Check the cable connections
Check for Software and Hardware Conflicts —See Resolving Software and Hardware
Incompatibilities.
Run the Dell Diagnostics —See Dell Diagnostics.
Optical drive problems
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.
Adjust the Windows volume control —
●Click the speaker icon in the lower-right corner of your screen.
●Ensure that the volume is turned up by clicking the slidebar and dragging it up.
●Ensure that the sound is not muted by clicking any boxes that are checked.
Check the speakers and subwoofer —See Sound and Speaker 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
your computer documentation for information on Power Management modes. See
Advanced Features.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (4 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
Hard drive problems
Run Check Disk —
1. Click the Start button and click My Computer.
2. Right-click Local Disk C:.
3. Click Properties.
4. Click the Tools tab.
5. Under Error-checking, click Check Now.
6. Click Scan for and attempt recovery of bad sectors.
7. Click Start.
E-Mail, Modem, and Internet Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions in the Product Information Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the
electrical outlet before opening the cover.
NOTICE: To prevent static damage to components inside your computer, discharge static
electricity from your body before you touch any of your computer's electronic components. You
can do so by touching an unpainted metal surface on the computer.
NOTE: Connect the modem to an analog telephone jack only. The modem does not operate
while it is connected to a digital telephone network.
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 the Start button and click Control Panel.
2. Click Printers and Other Hardware.
3. Click Phone and Modem Options.
4. Click the Modems tab.
5. Click the COM port for your modem.
6. Click Properties, click the Diagnostics tab, and then click Query Modem to
verify that the modem is communicating with Windows.
If all commands receive responses, the modem is operating properly.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (5 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
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.
Keyboard Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions located in the Product Information Guide.
Check the keyboard cable —
●Ensure that the keyboard cable is firmly connected to the computer.
●Shut down the computer, reconnect the keyboard cable as shown in the Quick
Reference Guide for your computer, and then restart the computer.
●Check the cable connector for bent or broken pins and for damaged or frayed
cables. Straighten bent pins.
●Remove keyboard extension cables and connect the keyboard directly to the
computer.
Test the keyboard —Connect a properly working keyboard to the computer, and try
using the keyboard. If the new keyboard works, the original keyboard is faulty.
Run the Dell Diagnostics —See Dell Diagnostics.
Check for software and hardware conflicts —see Resolving Software and Hardware
Incompatibilities.
Fan Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions in the Product Information Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the
electrical outlet before opening the cover.
NOTICE: To prevent static damage to components inside your computer, discharge static
electricity from your body before you touch any of your computer's electronic components. You
can do so by touching an unpainted metal surface on the computer.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (6 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
Check the cable connections —Ensure that the card fan cable is connected firmly to
the card fan connector on the system board (see the appropriate "System Board
Components" section for your computer).
Lockups and Software Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions in the Product Information Guide.
The computer does not start up
Check the Diagnostic Lights —See Diagnostic Lights.
Ensure that the power cable is firmly connected to the computer and to the
electrical outlet
The computer stops responding
NOTICE: You might lose data if you are unable to perform an operating system shutdown.
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
End the program —
1. Press <Ctrl><Shift><Esc> simultaneously.
2. Click Applications.
3. Click the program that is no longer responding.
4. Click End Task.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (7 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
A program crashes repeatedly
NOTE: Software usually includes installation instructions in its documentation or on a floppy
disk or CD.
Check the software documentation —If necessary, uninstall and then reinstall the
program.
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 —
●Ensure that the program is compatible with the operating system installed on your
computer.
●Ensure that your computer meets the minimum hardware requirements needed to
run the software. See the software documentation for information.
●Ensure that the program is installed and configured properly.
●Verify that the device drivers do not conflict with the program.
●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
Run the Dell Diagnostics —If all tests run successfully, the error condition is related
to a software problem. See Dell Diagnostics.
Media Card Reader Problems
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (8 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
No drive letter is assigned —
When Microsoft Windows XP detects the Media Card Reader, the device is automatically
assigned a drive letter as the next logical drive after all other physical drives in the
system. If the next logical drive after the physical drives is mapped to a network drive,
Windows XP does not automatically assign a drive letter to the Media Card Reader.
To manually assign a drive for the Media Card Reader:
1. Right-click My Computer and select Manage.
2. Select the Disk Management option.
3. Right-click the corresponding drive letter in the right pane that needs to be
changed.
4. Select Drive Letter and Paths.
5. From the drop-down list, select the new drive letter assignment for the Media Card
Reader.
6. Click OK to confirm your selection.
NOTE: Each slot in the Media Card Reader is mapped to a drive letter. A Media Card
Reader slot only appears as a mapped drive when a media card is installed in it. If you
attempt to access a drive that is mapped to an empty Media Card Reader slot, you are
prompted to insert media.
FlexBay device is Disabled —
There is a FlexBay disable option in the BIOS setup that appears only when the FlexBay
device is installed. If the FlexBay device is physically installed, but it is not running, check
to see if it is enabled in the BIOS setup.
Memory Problems
NOTE: Your computer might emit a series of beeps (beep code) during start-up if the monitor
cannot display errors or problems. This series of beeps identifies a problem. See Beep Codes for
more information.
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 located in the Product Information Guide.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (9 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
If you receive an insufficient memory message —
●Save and close any open files and exit any open programs you are not using to see
if that resolves the problem.
●See the software documentation for minimum memory requirements. If necessary,
install additional memory (see Installing Memory).
●Reseat the memory modules to ensure that your computer is successfully
communicating with the memory (see Memory).
●Run the Dell Diagnostics (see Dell Diagnostics).
If you experience other memory problems —
●Reseat the memory modules to ensure that your computer is successfully
communicating with the memory (see Installing Memory).
●Ensure that you are following the memory installation guidelines (see Memory).
●Run the Dell Diagnostics (see Dell Diagnostics).
Mouse Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions located in the Product Information Guide.
Check the mouse cable —
1. Check the cable connector for bent or broken pins and for damaged or frayed
cables. Straighten bent pins.
2. Remove mouse extension cables, if used, and connect the mouse directly to the
computer.
3. Shut down the computer, reconnect the mouse cable as shown in the Quick
Reference Guide for your computer, and then restart the computer.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (10 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
Restart the computer —
1. Simultaneously press <Ctrl><Esc> to display the Start menu.
2. Type u, press the keyboard arrow keys to highlight Shut down or Turn Off, and
then press <Enter>.
3. After the computer turns off, reconnect the mouse cable as shown on the in the
Quick Reference Guide for your computer.
4. Start the computer.
Test the mouse —Connect a properly working mouse to the computer, and try using
the mouse. If the new mouse works, the original mouse is faulty.
Check the mouse settings —
1. Click the Start button, click Control Panel, and then click Printers and Other
Hardware.
2. Click Mouse.
3. Try adjusting the settings.
If you are using a PS/2 mouse
1. Enter system setup (see Entering System Setup) and ensure that the Mouse Port
option is set to On.
2. Exit system setup and restart the computer.
Reinstall the mouse driver —See Reinstalling Drivers and Utilities.
Run the Dell Diagnostics —See Dell Diagnostics.
Check for software and hardware conflicts —See Resolving Software and Hardware
Incompatibilities.
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 located in the Product Information Guide.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (11 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
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
jack.
Check the network lights on the front or back of the computer depending on
system chassis type. —No connection speed 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.
Check for software and hardware conflicts —See Resolving Software and Hardware
Incompatibilities.
Power 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 located in the Product Information Guide.
If the power light is green and the computer is not responding —See Diagnostic
Lights.
If the power light is blinking green —The computer is in standby mode. Press a key
on the keyboard or move the mouse to resume normal operation.
If the power light is off —The computer is either turned off or is not receiving power.
●Reseat the power cable into both the power connector on the back of the computer
and the electrical outlet.
●If the computer is plugged into a power strip, ensure that the power strip is
plugged into an electrical outlet and that the power strip is turned on. Also bypass
power protection devices, power strips, and power extension cables to verify that
the computer turns on properly.
●Ensure that the electrical outlet is working by testing it with another device, such
as a lamp.
●Ensure that the main power cable and front panel cable are securely connected to
the system board.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (12 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
If the power light is amber and green or steady amber —A device might be
malfunctioning or incorrectly installed.
●Remove and then reinstall the memory modules.
●Remove and then reinstall any cards.
●Remove and then reinstall the graphics card, if applicable.
If the power light is blinking amber —
The computer is receiving electrical power, but an internal power problem might exist.
●Ensure that the voltage selection switch is set to match the AC power at your
location (if applicable).
●Ensure that the processor power cable is securely connected to the system board.
Eliminate interference —Some possible causes of interference are:
●Power, keyboard, and mouse extension cables
●Too many devices on a power strip
●Multiple power strips connected to the same electrical outlet
Printer 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 located in the Product Information Guide.
NOTE: If you need technical assistance for your printer, contact the printer's
manufacturer.
Check the printer documentation —See the printer documentation for setup and
troubleshooting information.
Ensure that the printer is turned on
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (13 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
Check the printer cable connections —
●See the printer documentation for cable connection information.
●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 the Start button, click Control Panel, and then click Printers and Other
Hardware.
2. Click View installed printers or fax printers.
If the printer is listed, right-click the printer icon.
3. Click Properties and click the Ports tab. 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
Restoring Default Settings
To restore the computer's system settings to their default values —
1. Turn on or restart your computer.
2. When Press <F2> to Enter Setup appears in the upper-right corner of the
screen, press <F2> immediately.
If you wait too long and the Microsoft® Windows® logo appears, continue to wait
until you see the Windows desktop. Then shut down your computer through the
Start menu and try again.
3. Under System Management, select the Maintenance option and follow the
directions on the screen (see System Setup Options).
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (14 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
Serial or Parallel Device 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 located in the Product Information Guide.
NOTE: If you are having a problem with a printer, see Printer Problems.
Check the option setting —See the device's documentation for the recommended
settings. Then enter system setup (see Entering System Setup) and ensure that the
Serial Port #1 setting (or the Serial Port #2 settings if you have an optional serial port
adapter installed) or the LPT Port Mode setting matches the recommended settings.
Run the Dell Diagnostics —See Dell Diagnostics.
Sound and Speaker 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 located in the Product Information Guide.
No sound from speakers
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 speaker cable connections —Ensure that the speakers are connected as
shown on the setup diagram supplied with the speakers. If you purchased an audio card,
ensure that the speakers are connected to the card.
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.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (15 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
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.
Enable digital mode —Your speakers do not work if the CD drive is operating in analog
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. Check the Enable digital CD audio for this CD-ROM device box.
Eliminate possible interference —Turn off nearby fans, fluorescent lights, or halogen
lamps to check for interference.
Run the speaker diagnostics
Reinstall the audio driver —See Reinstalling Drivers and Utilities.
Check the device option setting —Enter system setup (see Entering System Setup)
and ensure that the Audio Controller option is set to On. Exit system setup and restart
your computer.
If you have installed an audio card:
Enter system setup and ensure that Integrated Audio is set to Off.
Ensure that your speaker is connected to the audio card inputs
Run the Dell Diagnostics —See Dell Diagnostics.
Run the Audio Card Driver Diagnostics, If Applicable —
If you have installed an audio card, check your audio card documentation for details.
Check for software and hardware conflicts —See Reinstalling Drivers and Utilities.
No sound from headphones
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (16 of 18) [10/19/2007 9:39:12 AM]

Great user manuals database on UserManuals.info
Solving Problems: Dell OptiPlex 745 User's Guide
Check the headphone cable connection —Ensure that the headphone cable is
securely inserted into the headphone connector.
Disable digital mode —Your headphones do not work if the CD drive is operating in
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
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 located in the Product Information Guide.
If the screen is blank
NOTE: See the monitor documentation for troubleshooting procedures.
Check the monitor cable connection —
●If you purchased a graphics card, ensure that the monitor is connected to the card.
●Ensure that your monitor is properly connected (see the Quick Reference Guide
that came with your computer).
●If you are using a video extension cable and removing the cable solves the
problem, the cable is defective.
●Swap the computer and monitor power cables to determine if the power cable is
defective.
●Check the connector for bent or broken pins. (It is normal for monitor cable
connectors to have missing pins.)
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (17 of 18) [10/19/2007 9:39:12 AM]

Solving Problems: Dell OptiPlex 745 User's Guide
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.
Test the electrical outlet —Ensure that the electrical outlet is working by testing it
with another device, such as a lamp.
Test the monitor —Connect a properly working monitor to the computer, and try using
the monitor. If the new monitor works, the original monitor is faulty.
Check the diagnostic lights —See Diagnostic Lights.
Check the card setting —Enter system setup (see Entering System Setup) and ensure
that Primary Video option is set correctly. Exit system setup and restart your computer.
Run the monitor self-test —Check the monitor documentation for more information.
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.
Adjust the Windows display settings —
1. Click the Start button, click Control Panel, and then click Appearance and
Themes.
2. Click Display and click the Settings tab.
3. Try different settings for Screen resolution and Color quality.
Back to Contents Page
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (18 of 18) [10/19/2007 9:39:12 AM]