Dell ST2220T Monitor - Manual (Page 32)

Product-Specific Problems
Universal Serial Bus (USB) Specific Problems
Touch Screen problems
Intermittent
Problems Monitor malfunctions
on & off l Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.
l Reset the monitor to Factory Settings.
l Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode.
Missing Color Picture lacks color l Perform monitor self-test feature check.
l Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.
l Check for bent or broken pins in the video cable connector.
l Run the built-in diagnostics
Wrong Color Picture color not
good l Change the Color Setting Mode in the Color Settings OSD to Graphics or Video depending on the
application.
l Try a different Color Preset Setting in Color Settings OSD. Adjust R/G/B value in Color Settings OSD if the
Color Management is turned off.
l Change the Input Color Format to PC RGB or YPbPr in the Advance Setting OSD.
l Run the built-in diagnostics
Image retention from
a static image left on
the monitor for a
long period of time Faint shadow from
the static image
displayed appears on
the screen l Use the Power Management feature to turn off the monitor at all times when not in use (for more
information, see
Power Management Modes ).
l Alternatively, use a dynamically changing screensaver.
Specific Symptoms What You See Possible Solutions
Screen image is too small Image is centered on screen,
but does not fill entire viewing
area l Reset the monitor to Factory Settings.
Cannot adjust the monitor with
the keys on the front panel OSD does not appear on the
screen l Turn off the monitor, unplug the power cord, plug back, and then turn on the monitor.
No Input Signal when user
controls are pressed No picture, the LED light is
white. When you press "up",
"down" or "Menu" key, the
message appears l Check the signal source. Ensure that the Computer is not in the power saving mode by
moving the mouse or pressing any key on the keyboard.
l Check whether the signal cable is plugged in properly. Re -plug the signal cable if
necessary.
l Reset the computer or video player.
The picture does not fill the
entire screen. The picture cannot fill the
height or width of the screen l Due to different video formats (aspect ratio) of DVDs, the monitor may display in full
screen.
l Run the built-in diagnostics
NOTE: When choosing DVI-D or HDMI mode, the Auto Adjust function is not available.
Specific Symptoms What You See Possible Solutions
USB interface is not working USB peripherals are not
working l Check that your monitor is turned ON.
l Reconnect the upstream cable to your computer.
l Reconnect the USB peripherals (downstream connector).
l Switch off and then turn on the monitor again.
l Reboot the computer.
l Some USB devices like external portable HDD require higher electric current; connect the
device directly to the computer system.
High Speed USB 2.0 interface is
slow. High Speed USB 2.0
peripherals working slowly or
not working at all l Check that your computer is USB 2.0-capable.
l Some computers have both USB 2.0 and USB 1.1 ports. Ensure that the correct USB port
is used.
l Reconnect the upstream cable to your computer.
l Reconnect the USB peripherals (downstream connector).
l Reboot the computer.
Common Symptoms Possible Solutions
Touch screen does not respond
to touches l Make sure the USB cable is connected from the monitor to the computer.
l Make sure the touch screen is connected to a USB port that provides enough power for it (some peripherals, such as keyboards, include
USB ports that do not provide sufficient power for some devices). Try connecting the touch screen to a different USB port on the computer.
l Make sure Control panel -> System & security -> System -> Device Manager->.
l HID touch device is recognized as shown below.