Troubleshooting - NEC XM37 User Manual

Troubleshooting

Before arranging for service by the NEC Service Center, check the following to be sure repairs are needed.
Problem
No Picture or Sound
Sound OK; poor picture
with VIDEO signal input.
Sound OK; poor picture with
RGB signal input.
Picture OK; poor or no sound.
Poor sound from external speakers
or stereo system speakers
Remote control does not work.
S T A N D B Y / P O W E R i n d i c a t o r i s
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.
Possible Cause
Power cord unplugged.
Power outlet inactive.
Power of external equipment is not ON.
External equipment has been incorrectly connected.
Incorrect input selection.
Improper control setting.
Local interference.
Cable interconnections.
Input impedance is not correct level.
Improper control setting.
Incorrect 15 PIN connector pin connections.
Cable interconnections.
Volume is not adjusted.
Poor audio connections from external source.
Improper control settings.
MUTE key is ON.
Cable interconnections.
Improper volume setting.
Weak batteries.
Obstacle between Remote Control and Sensor
Window. (Wireless)
You are not within the effective operating range.
(Wireless)
Incorrect setting of No. 7 pin of the DIP SW. (Wireless)
When in the EXT. CONTROL mode, the remote
control unit will not operate the monitor.
Horizontal and/or vertical sync signal is not present
when the Intelligent Power Manager control is on.
Correction
Plug in power cord.
Be sure wall switch is on and outlet has power.
Switch to ON or connect to an active AC outlet.
Correct all connections.
Press correct RGB1, RGB 2, VIDEO 1 or VIDEO 2 button.
Adjust picture controls as needed.
Try another location for the monitor.
Be sure all connections are secure.
Check 75 ohm high impedance select switch.
Adjust picture controls as needed.
Check pin assignments and connections.
Be sure all connections are secure.
Adjust volume.
Correct audio connections.
Adjust volume controls.
Press again to restore sound.
Secure all cable connections.
Check volume controls of all components.
Install new batteries.
Point remote control directly at Sensor Window.
Use the remote control unit within 30 left and right
of center (at a distance of within 22ft).
Set Pin no. 7 of DIP SW to ON/SHORT.
Set Pin no.6 of DIP SW to OFF/OPEN.
Check the input signal.
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