Dell S2240Tb manual Touch Problem, Specific What You Possible Solutions Symptoms Experience

Safety Related	Visible signs of	• Do not perform any troubleshooting steps.
Issues	smoke or sparks	• Contact Dell immediately.
Intermittent	Monitor	• Ensure that the video cable connecting the monitor to the
Problems	malfunctions on	computer is connected properly and is secure.
	& off	• 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	• Change the Color Setting Mode in the Color Settings OSD
	good	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	Faint shadow	• Use the Power Management feature to turn off the monitor
from a static	from the static	at all times when not in use (for more information, see
image left on	image displayed	Power Management Modes).
the monitor for	appears on the	• Alternatively, use a dynamically changing screensaver.
a long period of	screen
time
Touch Problem
Specific	What You	Possible Solutions
Symptoms	Experience

Touch report	Touch function
error	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	Could not wake
no response in	up monitor and
saving mode	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.

Troubleshooting 47