Dell Precision T7400 (Late 2007) User 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