NEC NLT-40HDEM2 Owner's Manual page 45

Symptoms
No picture, no sound
Sound OK, poor picture
EN
Picture OK, poor sound
Picture blurred
Lines or streaks in picture
Poor reception on some channels
No colour
Poor colour
Remote control does not work
Incorrect position
Vertical bars or stripes on background
Horizontal noise
Signal Cable message appears
Check these items and try to adjust these
Power cord insert
Check power button
Try another channel (weak signal)
Check aerial (plugged into TV?)
Check aerial (broken lead?)
Check aerial
Check for local interference
Adjust contrast
Adjust brightness
Adjust colour
Adjust volume
Check the batteries in remote control
Check Audio/Video sockets (VCR only)
Auto-configure or adjust the H/V position
Auto-configure or adjust Clock
Auto-configure or adjust Clock Phase
Is the Signal Cable connected or loose
45