NEC 4001-20B User Manual - Page 149

Troubleshooting Check List

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9. Troubleshooting Check List Before contacting your dealer or service personnel, check the following list to be sure repairs are needed also by referring to the o Troubleshooting section on page 112 of your user's manual. This checklist below will help us solve your problem more efficiently. Frequency of Occurrence always sometimes (How often?________) other (________) Power No power (POWER indicator does not light green) See also "Status Indicator (STATUS)". Power cable's plug is fully inserted into the wall outlet. Main power switch is pressed to the ON position. Lamp cover is installed correctly. Shut down during operation. Power cable's plug is fully inserted into the wall outlet. Lamp cover is installed correctly. Power Management is turned off (only models with the Power Management function). Lamp Hours Used (lamp operation hours) was cleared after lamp replacement. Off Timer is turned off (only models with the Off Timer function). No power even though you press and hold the POWER button for a minimum of 2 seconds. Video and Audio No image is displayed from your PC or video equipment to the projector. Still no image even though you connect the projector to the PC first, then start the PC. Enabling your notebook PC's signal output to the projector. • A combination of function keys will enable/disable the external display. Usually, the combination of the "Fn" key along with one of the 12 function keys turns the external display on or off. No image (blue background, logo, no display). Still no image even though you press the AUTO ADJUST button. Still no image even though you carry out [Reset] in the projector's menu. Signal cable's plug is fully inserted into the input connector A message appears on the screen. The source connected to the projector is active and available. Still no image even though you adjust the brightness and/or the contrast. Input source's resolution and frequency are supported by the projector. Image is too dark. Remains unchanged even though you adjust the brightness and/or the contrast. Image is distorted. Image appears to be trapezoidal (unchanged even though you carry out the [Keystone] or [3D Reform] adjustment). Parts of the image are lost. Still unchanged even though you press the AUTO ADJUST button. Still unchanged even though you carry out [Reset] in the projector's menu. Image is shifted in the vertical or horizontal direction. Horizontal and vertical positions are correctly adjusted on a computer signal. Input source's resolution and frequency are supported by the projector. Some pixels are lost. Image is flickering. Still unchanged even though you press the AUTO ADJUST button. Still unchanged even though you carry out [Reset] in the projector's menu. Image shows flickering or color drift on a computer signal. Image appears blurry or out of focus. Still unchanged even though you checked the signal's resolution on PC and changed it to projector's native resolution. Still unchanged even though you adjusted the focus. No sound. Audio cable is correctly connected to the audio input of the projector. Still unchanged even though you adjusted the volume level. AUDIO OUT is connected to your audio equipment (only models with the AUDIO OUT connector). 137

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137
9. Troubleshooting Check List
Before contacting your dealer or service personnel, check the following list to be sure repairs
are needed also by referring to the
Troubleshooting section on page
112
of your user’s
manual. This checklist below will help us solve your problem more efficiently.
Frequency of Occurrence
always
sometimes (How often?________) other (________)
Power
No power (POWER indicator does not light green) See
also “Status Indicator (STATUS)”.
Power cable's plug is fully inserted into the wall out-
let.
Main power switch is pressed to the ON position.
Lamp cover is installed correctly.
Lamp Hours Used (lamp operation hours) was
cleared after lamp replacement.
No power even though you press and hold the
POWER button for a minimum of 2 seconds.
Shut down during operation.
Power cable's plug is fully inserted into the wall out-
let.
Lamp cover is installed correctly.
Power Management is turned off (only models with
the Power Management function).
Off Timer is turned off (only models with the Off
Timer function).
Video and Audio
No image is displayed from your PC or video equipment
to the projector.
Still no image even though you connect the projec-
tor to the PC first, then start the PC.
Enabling your notebook PC’s signal output to the
projector.
• A combination of function keys will enable/disable
the external display. Usually, the combination of the
“Fn” key along with one of the 12 function keys
turns the external display on or off.
No image (blue background, logo, no display).
Still no image even though you press the AUTO
ADJUST button.
Still no image even though you carry out [Reset] in
the projector’s menu.
Signal cable's plug is fully inserted into the input
connector
A message appears on the screen.
( __________________________________ )
The source connected to the projector is active and
available.
Still no image even though you adjust the bright-
ness and/or the contrast.
Input source's resolution and frequency are
supported by the projector.
Image is too dark.
Remains unchanged even though you adjust the
brightness and/or the contrast.
Image is distorted.
Image appears to be trapezoidal (unchanged even
though you carry out the [Keystone] or [3D Reform]
adjustment).
Parts of the image are lost.
Still unchanged even though you press the AUTO
ADJUST button.
Still unchanged even though you carry out [Reset]
in the projector’s menu.
Image is shifted in the vertical or horizontal direction.
Horizontal and vertical positions are correctly ad-
justed on a computer signal.
Input source's resolution and frequency are sup-
ported by the projector.
Some pixels are lost.
Image is flickering.
Still unchanged even though you press the AUTO
ADJUST button.
Still unchanged even though you carry out [Reset]
in the projector’s menu.
Image shows flickering or color drift on a computer
signal.
Image appears blurry or out of focus.
Still unchanged even though you checked the sig-
nal’s resolution on PC and changed it to projector’s
native resolution.
Still unchanged even though you adjusted the fo-
cus.
No sound.
Audio cable is correctly connected to the audio in-
put of the projector.
Still unchanged even though you adjusted the vol-
ume level.
AUDIO OUT is connected to your audio equipment
(only models with the AUDIO OUT connector).