Lenovo ThinkVision T22v-20 21.5" 16:9 VoIP IPS Monitor - Manual (Page 32)

Chapter 3. Reference information 3-4
Table3-2.Troubleshooting(continued)
Problem Possible cause Suggested action Reference
Screen is blank
and power
indicator is
steady amber or
flashing 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
2-11
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 1-7
The power
indicator is
white, but there
is no image.
The monitor
brightness and
contrast are at the
lowest setting.
Adjust the brightness and
contrast setting on the
OSD menu.
“Adjusting your monitor
image” on page 2-6
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 A, “Service
and Support” on page
A-1
● Fuzzy lines in
text or a
blurry image.
● Horizontal or
vertical lines
through the
image.
● Image setup has
not been
optimized
● Your system
Display
Properties setting
have not been
optimized.
Adjust the resolution
settings on your system
to match the native
resolution for this
monitor:
1920 x 1080 at 60 Hz.
“Adjusting your monitor
image” on page 2-6
● Fuzzy lines in
text or a
blurry image.
● Horizontal or
vertical lines
through the
image.
● Image setup has
not been
optimized
● Your system
Display
Properties setting
have not been
optimized.
Perform automatic image
setup. If automatic image
setup does not help,
perform manual image
setup.
“Selecting a supported
display mode” on page
2-10
● Fuzzy lines in
text or a
blurry image.
● Horizontal or
vertical lines
through the
image.
● Image setup has
not been
optimized
● 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.
The image is not
acceptable when
switching to
dual mode
It has not set the
optimum resolution
for each mode
● Use ThinkVision Duo
software to optimize
the dual screen
operation
● Adjust graphic card
resolution manually
“Using the direct access
controls” on page 2-6