DELL NT499 ユーザーズマニュアル

Troubleshooting

127

 

NOTICE: 

If your computer came with a PCI Express graphics card installed, 

removal of the card is not necessary when installing additional graphics cards; 
however, the card is required for troubleshooting purposes. If you remove the card, 
store it in a safe and secure location. For information about your graphics card, go 
to support.dell.com.

The screen is blank

 

NOTE: 

For troubleshooting procedures, see the monitor’s documentation.

C

HECK

 

THE

 

MONITOR

 

CABLE

 

CONNECTION

—

 

• Ensure that the monitor cable is connected to the correct graphics card (for dual 

graphics card configurations).

• If you are using a DVI-to-VGA adapter, ensure that the adapter is correctly attached to 

the graphics card and monitor.

• Ensure that the monitor cable is connected as shown on the setup diagram for your 

computer.

• Remove any video extension cables and connect the monitor directly to the computer.

• Swap the computer and monitor power cables to determine if the monitor’s power 

cable is defective.

• Check the connectors for bent or broken pins (it is normal for monitor cable 

connectors to have missing pins). 

C

HECK

 

THE

 

MONITOR

 

POWER

 

LIGHT

—

• If the power light is lit or blinking, the monitor has power.

• If the power light is off, firmly press the button to ensure that the monitor is 

turned on.

• If the power light is blinking, press a key on the keyboard or move the mouse to 

resume normal operation.

T

EST

 

THE

 

ELECTRICAL

 

OUTLET

—

Ensure that the electrical outlet is working by 

testing it with another device, such as a lamp.

C

HECK

 

THE

 

DIAGNOSTIC

 

LIGHTS

—

See “Diagnostic Lights” on page 61.

The screen is difficult to read

C

HECK

 

THE

 

MONITOR

 

CABLE

 

CONNECTION

—

• Ensure that the monitor cable is connected to the correct graphics card (for dual 

graphics card configurations).