Dell Precision T7400 - Manual (Page 50)

50 Quick Reference Guide
• 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.
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.