NEC 4200W Troubleshooting, Checks, Remedy, Symptom

Troubleshooting

If the picture quality is poor or there is some other problem, check the adjustments, operations, etc., before requesting service.

Symptom		Checks		Remedy
Sound can be heard from inside the dis-	•	Is there a wall or other object near the	•	Move the display away from the wall or
play.		display which is reflecting the sound?		other object reflecting the sound.
				The display is equipped with built-in ven-
				tilation fans for preventing overheating. In
				some cases the sound of the fan turning
				may be heard.
There are points shining on the screen	•	Picture of plasma display consist of a collection of tiny fluorescent points. Some
or points that do not light.		of the picture elements may not light, and others may shine.
Afterimages appear.	•	Has a still picture from a video or a com-	•	Play a moving picture.
		puter image been displayed for a long		The afterimage will gradually disappear.
		period of time?
Picture is disturbed.	•	Is a connected component set directly in	•	Leave some space between the display and
Sound is noisy.		front or at the side of the display?		the connected components.
Remote control unit operates errone-
ously.
The remote controller does not work.	•	Are the remote controller’s batteries	•	Replace all two batteries with new ones.
		worn out?
Monitor’s power does not turn on when	•	Is the monitor’s power cord plugged into	•	Plug the monitor’s power cord into a power
the remote controller’s power button is		a power outlet?		outlet.
pressed.	•	Are all the monitor’s indicators off?	•	Press the power button on the monitor to
				turn on the power.
	•	Are the remote controller’s batteries	•	Replace all two batteries with new ones.
		worn out?
Monitor does not operate when the re-	•	Is the remote controller pointed at the	•	Point the remote controller at the monitor’s
mote controller’s buttons are pressed.		monitor, or is there an obstacle between		remote control sensor when pressing but-
		the remote controller and the monitor?		tons, or remove the obstacle.
	•	Is direct sunlight or strong artificial light	•	Eliminate the light by closing curtains, point-
		shining on the monitor’s remote control		ing the light in a different direction, etc.
		sensor?
	•	Are the remote controller’s batteries	•	Replace all two batteries with new ones.
		worn out?
No sound or picture is produced.	•	Is the monitor’s power cord plugged into	•	Plug the monitor’s power cord into a power
		a power outlet?		outlet.
Picture appears but no sound is pro-	•	Is the volume set at the minimum?	•	Increase the volume.
duced.	•	Is the mute mode set?	•	Press the remote controller’s mute button.
			•	Connect the speakers properly.
Tint is poor or colors are weak.	•	Are the speakers properly connected?	•	Adjust the tint and color (under “PIC-
	• Are the tint and colors properly adjusted?			TURE”).
Nothing appears on screen.	•	Is the computer’s power turned on?	•	Turn on the computer’s power.
	•	Is the computer connected?	•	Connect the computer to the monitor.
	•	Is the power manager function in the	•	Operate the computer (move the mouse,
		standby or off mode?		etc.).
Part of picture is cut off or picture is	•	Is the position adjustment appropriate?	•	Adjust the “RGB ADJ.” properly.
not centered.
Image is too large or too small.	•	Is the screen size adjustment appropri-	•	Press the “WIDE/AUTO WIDE” button on
		ate?		the remote controller and adjust properly.
Picture is unstable.	•	Is the computer’s resolution setting ap-	•	Set to the proper resolution.
		propriate?

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