Dell U2412M Monitor - Manual (Page 41)

Product Specific Problems
Universal Serial Bus (USB) Specific Problems
NOTE: When using DVI-D input, the positioning adjustments are not available.
Horizontal/Vertical Lines Screen has one or more lines l Reset the monitor to Factory Settings.
l Perform Auto Adjust via OSD.
l Adjust Phase and Pixel Clock controls via OSD.
l Perform monitor self-test feature check and determine if these lines are also in self-test
mode.
l Check for bent or broken pins in the video cable connector.
l Run the built-in diagnostics.
NOTE: When using DVI-D input, the Pixel Clock and Phase adjustments are not available.
Synchronization Problems Screen is scrambled or appears
torn l Reset the monitor to Factory Settings.
l Perform Auto Adjust via OSD.
l Adjust Phase and Pixel Clock controls via OSD.
l Perform monitor self-test feature check to determine if the scrambled screen appears in
self-test mode.
l Check for bent or broken pins in the video cable connector.
l Restart the computer in the safe mode.
Safety Related Issues Visible signs of smoke or
sparks l Do not perform any troubleshooting steps.
l Contact Dell immediately.
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 missing 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.
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 different Color Preset Settings 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 Experience Possible Solutions
Screen image is too small Image is centered on screen,
but does not fill entire viewing
area l Check the Scaling Ratio setting in Image Setting OSD
l Reset the monitor to Factory Settings.
Cannot adjust the monitor with
the buttons on the front panel OSD does not appear on the
screen l Turn off the monitor, unplug the power cord, plug it back, and then turn on the monitor.
l Check whether the OSD menu is locked. If yes, press and hold the button above the
Power button for 10 seconds to unlock (for more information, see
Menu Lock ).
No input signal when user
controls are pressed No picture, the LED light is blue l Check the signal source. Ensure 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 mode, the Auto Adjust function will not be available.
Specific Symptoms What You Experience 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.