Chapter 3. Troubleshooting - Lenovo ThinkVision P27u-20 User Manual

Chapter 3. 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.
Table 3-1. Troubleshooting
Problem Possible cause
The words" Out The system is set
of Range" are to a display mode
shown on the which is not
screen, and the supported by the
power indicator is monitor.
flashing white.
The image quality The video signal
is unacceptable. cable is not
connected with the
monitor or system
completely.
The image quality The color settings
is unacceptable. may be incorrect.
The power The monitor's

indicator is not lit power switch is
and there is no not switched on.
image.
The power cord

is loose or
disconnected.
There is no

power at the
outlet.
Suggested action
If you are replacing an old

monitor, reconnect it and adjust
the display mode to within the
specified range for your new
monitor.
If using a Windows system,

restart the system in safe mode,
then select a supported display
mode for your computer.
If these options do not work,

contact the Customer Support
Centre.
Be sure the signal cable is firmly
plugged into the system and
monitor.
Select another colour setting from
the OSD menu.
Be sure the power cord is

connected properly.
Be sure the outlet has power.

Power on the monitor.

Try using another power cord.

Try using another electrical

outlet.
Reference
"Maximum resolutions"
on page 2-6
"Connecting and turning
on your monitor" on
page 1-3
"Explore your monitor"
on page 2-1
"Connecting and turning
on your monitor"
on page 1-3
Chapter 3 Troubleshooting 3-1