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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.

 

 

 

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.

 

 

 

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.

 

 

 

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.

 

 

 

Poor sound from external speakers

Cable interconnections.

Secure all cable connections.

or stereo system speakers

Improper volume setting.

Check volume controls of all components.

 

 

 

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)

 

 

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.

 

 

 

 

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.

 

blinking

 

 

 

 

 

 

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.

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