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Troubleshooting
If you have a problem setting up or using your monitor, you might be able to
solve it yourself. Before calling your dealer or Lenovo, try the suggested actions
that are appropriate to your problem.
Table3-2.Troubleshooting
Problem Possible cause Suggested action Reference
The USB
cable
is not
connected
with
the monitor
or
system
completely.
Be sure the USB cable is
firmly plugged into the
system and monitor.
“Connecting and turning
on your monitor” on
page 1-3
The image
quality is
unacceptable.
The power
lit and
there is
no
image.
indicator is not
●
There is no
power at the
outlet.
●
Try using another
electrical outlet.
“Connecting and turning
on your monitor” on
page 1-3
3-2
LT1421 Wide Flat Panel Monitor User’s Guide
The USB
cable
is loose or
disconnected
with
the
monitor
or
system.
●
●
Be sure the USB cable is
connected properly.
One or more of
the pixels
appear
discolored
This is a
characteristic
of the
LCD
technology
and is not
an LCD
defect.
If there are more than
five pixels missing,
contact the Customer
Support Center.
Appendix A, “Service and
Support,” on page A-1
Getting further help
If you still can’t solve your problem, please contact the Customer Support Center.
For more information on contacting the Customer Support Center, please see
Appendix A, “Service and Support,” on page A-1.
LT1421 wide
monitor is turned
off when
the laptop’s
power
supply is
switched
from
AC to DC
“igfxpers.exe”
turn off the
display
Step1:Press “Winkey+R”key
Step2:Input “msconfig”
Step3:Select “Startup
Step4:You will see the column of
“command”, find
C: ﹨Windows\system32\igfxpers.exe”,
then uncheck it.
Step5:Press “Apply”
Step6:Re-start the Notebook.