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Troubleshooting
Before arranging for service by the NEC Service Center, check the following to be sure repairs are needed.
Problem | Possible Cause | Correction |
No Picture or Sound | Power cord unplugged. | Plug in power cord. |
| Power outlet inactive. | Be sure wall switch is on and outlet has power. |
| Power of external equipment is not ON. | Switch to ON or connect to an active AC outlet. |
| External equipment has been incorrectly connected. | Correct all connections. |
| Incorrect input selection. | Press correct RGB1, RGB 2, VIDEO 1 or VIDEO 2 button. |
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Sound OK; poor picture | Improper control setting. | Adjust picture controls as needed. |
with VIDEO signal input. | Local interference. | Try another location for the monitor. |
| Cable interconnections. | Be sure all connections are secure. |
| Input impedance is not correct level. | Check 75 ohm high impedance select switch. |
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Sound OK; poor picture with | Improper control setting. | Adjust picture controls as needed. |
RGB signal input. | Incorrect 15 PIN connector pin connections. | Check pin assignments and connections. |
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Picture OK; poor or no sound. | Cable interconnections. | Be sure all connections are secure. |
| Volume is not adjusted. | Adjust volume. |
| Poor audio connections from external source. | Correct audio connections. |
| Improper control settings. | Adjust volume controls. |
| MUTE key is ON. | Press again to restore sound. |
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Poor sound from external speakers | Cable interconnections. | Secure all cable connections. |
or stereo system speakers | Improper volume setting. | Check volume controls of all components. |
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Remote control does not work. | Weak batteries. | Install new batteries. |
| Obstacle between Remote Control and Sensor | Point remote control directly at Sensor Window. |
| Window. (Wireless) |
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| You are not within the effective operating range. | Use the remote control unit within 30° left and right |
| (Wireless) | of center (at a distance of within 22ft). |
| Incorrect setting of No. 7 pin of the DIP SW. (Wireless) | Set Pin no. 7 of DIP SW to ON/SHORT. |
| When in the EXT. CONTROL mode, the remote | Set Pin no.6 of DIP SW to OFF/OPEN. |
| control unit will not operate the monitor. |
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STANDBY/POWER indicator is | Horizontal and/or vertical sync signal is not present | Check the input signal. |
when the Intelligent Power Manager control is on. |
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blinking |
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In the following case, power off the monitor immediately and contact your dealer or authorized NEC Service Center.
The monitor turns off in 5 seconds after powering on and then the STANDBY/POWER indicator blinks in one second intervals. It indicates that the power
supply circuit or, one or more fans have been damaged.46
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