Lenovo ThinkVision P27u-20 27" 4K IPS Monitor - Manual (Page 32)

3-2 P27u-20 Flat Panel Monitor User’s Guide
Table 3-1. Troubleshooting (continued)
Problem Possible cause Suggested action Reference
Screen is blank and
power indicator is
breathing white.
The monitor is in
Standby/Suspend
mode

Press any key on the
keyboard or move the
mouse to restore operation.

Check the Power options
settings on your computer.
“Understanding power
management” on page
2-9
The power indicator
is white, but there is
no image.
The video signal cable
is loose or
disconnected from the
system or monitor.
Be sure the video cable is
connected with the system
properly.
“Connecting and turning
on your monitor” on
page 1-3
The monitor
brightness and
contrast are at the
lowest setting.
Adjust the brightness and
contrast setting on the OSD
menu.
“Explore your monitor”
on page 2-1
One or more of the
pixels appear
discoloured
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 Centre.
Appendix C, “Service and
support” on page
C-1

Fuzzy lines in text
or a blurry image.

Horizontal or
vertical lines
through the image.

Your system
Display Properties
setting have not
been optimized.
Adjust the resolution settings
on your system to match the
native resolution for this
monitor:
3840 x 2160 at 60 Hz.
“Explore your monitor”
on page 2-1

Your system
Display Properties
setting have not
been optimized.
When working in the native
resolution, you may find
additional improvements by
adjusting the Dots Per Inch
(DPI) setting on your system.
See the Advanced section
of your system’s display
properties.