Dell T3400 manual Screen is blank, Screen is difficult to read, 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 H E C K T H E M O N I T O R C A B L E C O N N E C T I O N —

•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 H E C K T H E M O N I T O R P O W E R L I G H T —

•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.

TE S T T H E E L E C T R I C A L O U T L E T — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.

C H E C K T H E D I A G N O S T I C L I G H T S — See “Diagnostic Lights” on page 61.

The screen is difficult to read

C H E C K T H E M O N I T O R C A B L E C O N N E C T I O N —

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

Troubleshooting

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