Troubleshooting
If the picture quality is poor or there is some other problem, check the adjustments, operations, etc., before requesting service.
| Symptom |
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| Checks |
| Remedy | ||
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- |
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ously. |
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The remote controller does not work. | • | Are the remote controller’s batteries worn | • Replace both batteries with new ones. | ||||
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| out? |
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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 |
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| a power outlet? |
| outlet. | ||
pressed. | • | Are all the monitor’s indicators off? | • | Press the power button on the monitor to | |||
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| turn on the power. |
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| • Are the remote controller’s batteries worn | • Replace both batteries with new ones. | ||||
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| out? |
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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- | |||
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| the remote controller and the monitor? |
| tons, or remove the obstacle. | ||
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| • | Is direct sunlight or strong artificial light | • Eliminate the light by closing curtains, point- | |||
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| shining on the monitor’s remote control |
| ing the light in a different direction, etc. | ||
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| sensor? |
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| • Are the remote controller’s batteries worn | • Replace both batteries with new ones. | ||||
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| out? |
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| • | The remote cable is plugged into the | • Unplung the remote cable from the monitor. | |||
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| REMOTE IN terminal (Wired) |
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| • | The front panel buttons of the main unit | • | The front panel buttons do not function | ||
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| do not function. |
| during Control Lock. | ||
No sound or picture is produced. | • | Is the monitor’s power cord plugged into | • Plug the monitor’s power cord into a power | ||||
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| 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. | ||||
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| • Are the speakers properly connected? | • Connect the speakers properly. | ||||
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| • Is AUDIO INPUT set correctly? | • | Set AUDIO INPUT on the OPTION menu | |||
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| correctly. |
Poor picture with VIDEO signal input. | • | Improper control setting. | • Adjust picture control as needed. | ||||
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| Local interference. |
| Try another location for the monitor. | ||
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| Cable interconnections. |
| Be sure all connections are secure. | ||
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| Input impedance is not correct level. |
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Poor picture with RGB signal input. | • | Improper control setting. | • Adjust picture controls as needed. | ||||
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| Incorrect 15 PIN connector pin |
| Check pin assignments and connections. | ||
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| connections. |
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Tint is poor or colors are weak. | • | Are the tint and colors properly adjusted? | • Adjust the tint and color (under “PICTURE”). | ||||
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Nothing appears on screen. | • | Is the computer’s power turned on? | • Turn on the computer’s power. | ||||
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| • Is a source connected? | • Connect source to the monitor. | ||||
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| • | Is the power manager function in the | • Operate the computer (move the mouse, etc.). | |||
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| standby or off mode? |
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Part of picture is cut off or picture is not | • | Is the position adjustment appropriate? | • | Adjust the “SCREEN” properly. | |||
centered. |
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Image is too large or too small. | • | Is the screen size adjustment appropri- | • | Press the “WIDE” button on the remote | |||
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| ate? |
| controller and adjust properly. | ||
Picture is unstable. | • | Is the computer’s resolution setting | • Set to the proper resolution. | ||||
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| appropriate? |
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POWER/STANDBY indicator is lighted | • | Horizontal and / or vertical sync signal is | • Check the input signal. | ||||
in orange or red. |
| not present when the Intelligent Power |
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| Manager control is on. |
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POWER/STANDBY indicator is blinking | • | The temperature inside the main unit has | • | Promptly switch off the power of the main | |||
in red. |
| become too high and has activated the |
| unit and wait until the internal temperature | |||
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| protector. |
| drops. See*1. | ||
POWER/STANDBY indicator is blinking |
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| • | Prompty switch off the power of the main | |
in green. |
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| unit. See *2. | |
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*1 Overheat protector
If the monitor becomes too hot, the overheat protector will be activated and the monitor will be turned off. If this happens., turn off the power to the monitor and unplug the power cord. If the room where the monitor is installed is particularly hot, move monitor to a cooler location and wait for the monitor to cool for 60 minutes. If the problem persists, contact your NEC dealer for service.
*2 In the following case, power off the monitor immediately and contact your dealer or authorized NEC Center.
The monitor turns off 5 seconds after powering on and then the POWER/STANDBY indicator blinks. It indicators that the power supply circuit or, one more fans have been damaged.
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