Troubleshooting - Lenovo D20-30 User Manual

Troubleshooting

If you encounter problems setting up or using your display, you may be able to solve the problem.
Before contacting your dealer or Lenovo, please try the following suggested actions depending on the
problem you are experiencing.
Table 3-2. Troubleshooting
Problem
"Out of Range" is
displayed on the screen
and the power indicator
flashes White.
Poor image quality
The power indicator
does not light up and
no images are
displayed.
The screen is blank and
the power indicator
shows yellow.
The power indicator
shows amber and no
images are displayed
One or more pixels
change color
Chapter 3 3-3
Possible Causes
This display does not
support the display mode set
by the system
The video signal cable is not
well connected to the
display or the system.
The color setting may be
incorrect.
The automatic image setting
function is not performed.
•The display's power switch
is not turned on.
•The power cord is loose or
not connected.
•The outlet has no
electricity.
The display is in
standby/hang-up mode
Video signal cable is loose
or disconnected from the
system or display.
The display brightness and
contrast are at their lowest
settings.
This is an inherent
characteristic of LCD
technology and is not an
LCD defect.
Recommended Operations
•If you are replacing an old
display, reconnect it and
adjust the display mode to the
range supported by the new
display.
•If you are using a Windows
system, restart the system in
safe mode and select a
supported display mode for
your computer.
•If these options do not work,
please contact Customer
Support.
Make sure the signal cable is
securely plugged into the
system and display.
Select another color setting in
the OSD menu.
Perform automatic image
setup.
•Make sure the power cord is
well connected.
•Make sure the outlet has
power.
•Power on the display.
•Change the power cord.
•Change the power outlet.
•Press any key on the
keyboard or move the mouse
to resume operation.
•Check the power options
settings on the computer.
Make sure the video cable is
well connected to the system.
Adjust the Brightness and
Contrast settings in the OSD
menu.
If more than five pixels are
missing, please contact
Support Center
Refer to
"Select Support
Display Mode" on
pages 2-6
"Connecting and
Powering on the
Display" on pages
1-5
"Adjusting the
Display Image" on
pages 2-3
"Adjusting the
Display Image" on
pages 2-3
"Connecting and
Powering on the
Display" on pages
1-5
"Understanding
Power
Management" on
pages 2-7
"Connecting and
Powering on the
Display" on pages
1-5
"Adjusting the
Display Image" on
pages 2-3
"Appendix A.
Service and
Support" on pages
A-1