Poor Focus | Dell S2240Tb instruction

•Perform Auto Adjust via OSD.

•Adjust the Phase and Pixel Clock controls via OSD.

•Eliminate video extension cables.

•Reset the monitor to Factory Settings.

•Change the video resolution to the correct aspect ratio (16:9).

Shaky/Jittery	Wavy picture or
Video	fine movement

•Perform Auto Adjust via OSD.

•Adjust the Phase and Pixel Clock controls via OSD.

•Reset the monitor to Factory Settings.

•Check environmental factors.

•Relocate the monitor and test in another room.

Missing Pixels LCD screen has spots

•Cycle power on-off.

•Pixel that is permanently off is a natural defect that can occur in LCD technology.

•For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: support.dell.com.

Stuck-on Pixels LCD screen has bright spots

•Cycle power on-off.

•Pixel that is permanently off is a natural defect that can occur in LCD technology.

•For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: support.dell.com.

Brightness	Picture too dim	• Reset the monitor to Factory Settings.
Problems	or too bright	• Auto Adjust via OSD.
		• Adjust brightness & contrast controls via OSD.

Geometric	Screen not	• Reset the monitor to Factory Settings.
Distortion	centered	• Auto Adjust via OSD.
	correctly	• Adjust horizontal & vertical controls via OSD.
		NOTE: When using DVI-D/HDMI input, the positioning
		adjustments are not available.

Horizontal/	Screen has one	• Reset the monitor to Factory Settings.
Vertical Lines	or more lines	• Perform Auto Adjust via OSD.
		• Adjust Phase and Pixel Clock controls via OSD.
		• Perform monitor self-test feature check and determine if
		these lines are also in self-test mode.
		• Check for bent or broken pins in the video cable connector.
		• Run the built-in diagnostics.
		NOTE: When using DVI-D/HDMI input, the Pixel Clock and
		Phase adjustments are not available.

Synchronization	Screen is	• Reset the monitor to Factory Settings.
Problems	scrambled or	• Perform Auto Adjust via OSD.
	appears torn	• Adjust Phase and Pixel Clock controls via OSD.
		• Perform monitor self-test feature check to determine if the
		scrambled screen appears in self-test mode.
		• Check for bent or broken pins in the video cable connector.
		• Restart the computer in the safe mode.

46 Troubleshooting