Dell Precision T7400 (Late 2007) - Manual (Page 51)

Quick Reference Guide 51
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).
• If you are using the optional 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.
T E 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 26.
C H E C K T H E M O N I T O R S E T T I N G S — See the monitor documentation for instructions
on adjusting the contrast and brightness, demagnetizing (degaussing) the monitor,
and running the monitor self-test.
M O V E T H E S U B W O O F E R A W A Y F R O M T H E M O N I T O R — If your speaker system
includes a subwoofer, ensure that the subwoofer is positioned at least 60 centimeters
(2 feet) away from the monitor.
M O V E T H E M O N I T O R A W A Y F R O M E X T E R N A L P O W E R S O U R C E S — 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.
R O T A T E T H E M O N I T O R T O E L I M I N A T E S U N L I G H T G L A R E A N D P O S S I B L E
I N T E R F E R E N C E