Dell ST2220L User Manual

4. Carefully inspect the screen for abnormalities.
5. Press the shortcut button 4 key on the front panel again. The color of the screen changes to red.
6. Inspect the display for any abnormalities.
7. Repeat steps 5 and 6 to inspect the display in green, blue, and white colored screens.
The test is complete when the white screen appears. To exit, press the shortcut button 4again.
If you do not detect any screen abnormalities upon using the built-in diagnostic tool, the monitor is functioning properly. Check the video card and computer.
OSD Warning Messages
For OSD-related issues, see OSD Warning Messages.
Common Problems
The following table contains general information about common monitor problems that you might encounter and the possible solutions.
Common Symptoms
What You Experience
Possible Solutions
No Video/Power LED off
No picture
l
Ensure that the video cable connecting the monitor and the computer is properly connected and
secure.
l
Verify that the power outlet is functioning properly using any other electrical equipment.
l Ensure that the power button is depressed fully.
No Video/Power LED on
No picture or no brightness
l Increase brightness & contrast controls via OSD.
l Perform monitor self-test feature check.
l Check for bent or broken pins in the video cable connector.
l Run the built-in diagnostics.
Poor Focus
Picture is fuzzy, blurry, or ghosting
l Perform Auto Adjust via OSD.
l Adjust the Phase and Pixel Clock controls via OSD.
l Eliminate video extension cables.
l Reset the monitor to Factory Settings.
l Change the video resolution to the correct aspect ratio (16:9).
Shaky/Jittery Video
Wavy picture or fine movement
l Perform Auto Adjust via OSD.
l Adjust the Phase and Pixel Clock controls via OSD.
l Reset the monitor to Factory Settings.
l Check environmental factors.
l Relocate the monitor and test in another room.
Missing Pixels
LCD screen has spots
l Cycle power on-off.
l Pixel that is permanently off is a natural defect that can occur in LCD technology.
l Run the built-in diagnostics.
Stuck-on Pixels
LCD screen has bright spots
l Cycle power on-off.
l Pixel that is permanently off is a natural defect that can occur in LCD technology.
l Run the built-in diagnostics.
Brightness Problems
Picture too dim or too bright
l Reset the monitor to Factory Settings.
l Auto Adjust via OSD.
l Adjust brightness & contrast controls via OSD.
Geometric Distortion
Screen not centered correctly
l Reset the monitor to Factory Settings.
l Auto Adjust via OSD.
l Adjust brightness & contrast controls via OSD.
Horizontal/Vertical Lines
Screen has one or more lines
l Reset the monitor to Factory Settings.
l Perform Auto Adjust via OSD.

Dell ST2220L Specifications

General

3D	No
Pixel pitch	0.248 x 0.248 mm
Aspect ratio	-
Display diagonal	21.5 \
Viewing angle, vertical	160 °
Contrast ratio (dynamic)	8000000:1
Display number of colors	16.78 million colors
Viewing angle, horizontal	170 °
Display brightness (typical)	250 cd/m²
Supported graphics resolutions	1920 x 1080 (HD 1080)
HDCP	Yes
DVI-I ports quantity	0
Panel mounting interface	No mm
Input current	2 A
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (max)	28 W
Power consumption (off)	0.5 W
Power consumption (standby)	1 W
Power consumption (typical)	20 W
Product color	Black
Market positioning	Business
Sustainability certificates	EPEAT Silver, ENERGY STAR

Weight and Dimensions

Depth (with stand)	230 mm
Width (with stand)	508 mm
Height (with stand)	386 mm
Weight (with stand)	4082 g
Width (without stand)	- mm
Weight (without stand)	- g