Troubleshooting - NEC NLT-23W User Manual

Troubleshooting

Problem
No picture on screen and no sound
from speakers
No picture/No picture from AV
terminal
Picture is displayed, but no sound
from the speakers.
Picture is too light
Picture is too dark.
Remote control does not work.
The picture is not sharp.
The picture moves.
The picture is doubled or tripled.
The picture is spotted.
There are stripes on the screen or
colors fade.
30
Check item
• Insert the AC power cord plug securely in AC power
outlet.
• Make sure the set is not in the standby mode
(The POWER/Standby indicator is red.)
• Check the brightness setting of the display.
• Lamp may have malfunction.
• Check the sound setting.
• Make sure the sound is not muted.
• Make sure a pair of headphones is not connected.
• Make sure the connectors of the optional speaker
system are securely inserted.
• Make sure COLOR and CONTRAST settings.
• Make sure BRIGHTNESS setting is not set too low.
• Lamp may have malfunction.
• Change the batteries.
• Make sure the infrared transmitter window is not
receiving strong light such as light from fluorescent
lamps.
•The reception may be weak.
• The state of the broadcast may also be bad.
• Make sure the antenna is facing the right direction.
• Make sure the outside antenna is not disconnected.
• Make sure the antenna is facing the right direction.
• There may be reflected electric waves from
mountains or buildings.
• There may be interference from automobiles, trains,
high voltage lines, neon lights, etc.
• There may be interference between the antenna cable
and power cable. Try positioning them further apart.
• Is the unit receiving interference from other devices?
Transmission antennas of radio broadcasting stations
and transmission antennas of amateur radios and
cellular phones may also cause interference.
• Use the unit as far apart as possible from devices
that may cause possible interference.