Troubleshooting - Lenovo ThinkVision E28u-20 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. Reference Information 3-3
Possible Causes Recommended Operations
•If you are replacing an old
This display does not
support the display display, reconnect it and
mode set by the adjust the display mode to the
system 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.
The video signal cable Make sure the signal cable is
is not well connected securely plugged into the
to the display or the system and display.
system.
The color setting may Select another color setting in
be incorrect. the OSD menu.
The automatic image Perform automatic image
setting function is not setup.
performed.
•The display's power •Make sure the power cord is
switch is not turned well connected.
•Make sure the outlet has
on.
•The power cord is
power.
•Power on the display.
loose or not
•Change the power cord.
connected.
•The outlet has no •Change the power outlet.
electricity.
•Press any key on the
The display is in
standby/hang-up keyboard or move the mouse
mode to resume operation.
•Check the power options
settings on the computer.
Video signal cable is Make sure the video cable is
loose or disconnected well connected to the system.
from the system or
display.
The display brightness Adjust the Brightness and
and contrast are at Contrast settings in the OSD
their lowest settings. menu.
This is an inherent If more than five pixels are
characteristic of LCD missing, please contact
technology and is not Support Center
an LCD defect.
Refer to
"Select Support
Display Mode" on
pages 2-6
"Connecting and
Powering on the
Display" on pages
1-6
"Adjusting the
Display Image" on
pages 2-3
"Adjusting the
Display Image" on
pages 2-3
"Connecting and
Powering on the
Display" on pages
1-6
"Understanding
Power
Management" on
pages 2-7
"Connecting and
Powering on the
Display" on pages
1-6
"Adjusting the
Display Image" on
pages 2-3
"Appendix A.
Service and
Support" on pages
A-1