Dell S2240Tb Computer Monitor User Manual


 
Troubleshooting | 47
Touch Problem
Safety Related
Issues
Visible signs of
smoke or sparks
Do not perform any troubleshooting steps.
Contact Dell immediately.
Intermittent
Problems
Monitor
malfunctions on
& off
Ensure that the video cable connecting the monitor to the
computer is connected properly and is secure.
Reset the monitor to Factory Settings.
Perform monitor self-test feature check to determine if the
intermittent problem occurs in self-test mode.
Missing Color Picture missing
color
Perform monitor self-test feature check.
Ensure that the video cable connecting the monitor to the
computer is connected properly and is secure.
Check for bent or broken pins in the video cable connector.
Wrong Color Picture color not
good
Change the Color Setting Mode in the Color Settings OSD
to Graphics or Video depending on the application.
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.
Change the Input Color Format to PC RGB or YPbPr in the
Advance Setting OSD.
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
Use the Power Management feature to turn off the monitor
at all times when not in use (for more information, see
Power Management Modes
).
Alternatively, use a dynamically changing screensaver.
Specific
Symptoms
What You
Experience
Possible Solutions
Touch report
error
Touch function
miss alignment or
no touch
function
Make sure power cord comes with ground pin.
Unplug and replug the DC cable from power adapter to
allow touch module auto recalibration.
Make sure to use Dell provide USB cable, connect with
computer.
Make sure computer support USB 2.0 cable.
If the device cannot be detected by system, power off/on
the monitor or plug out/in the USB cable.
Touch screen
no response in
saving mode
Could not wake
up monitor and
computer by
touching in
saving mode
Access to Device Manager and choose HID Interface Device
under Human Device.
Select HID- compliant device Properties
Allow the device to wake the computer.