NEC UM330X/UM280X/UM330W/UM280W User Manual

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 exter-

No image (blue or black background, 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�

 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 in your user’s manual. This checklist below will help us solve your problem
more efficiently.
* Print this page and the next page for your check.

Frequency of occurrence   always   sometimes (How often?_____________________)   other (__________________)
Power

No power (POWER indicator does not light blue)  See also “Status 

Indicator (STATUS)”�

Power cord’s plug is fully inserted into the wall outlet�
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 but-

ton�

Shut down during operation�

Power cord’s plug is fully inserted into the wall outlet�
Lamp cover is installed correctly �
[AUTO POWER OFF] is turned off (only models with the [AUTO 

POWER OFF] function)�
[OFF TIMER] is turned off (only models with the [OFF TIMER] 

function)�

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] 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�
Still unchanged even though you change [FAN MODE] from 

[HIGH ALTITUDE] to [AUTO]�

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)�

Remote control does not work�

No  obstacles  between  the  sensor  of  the  projector  and  the 

remote control�
Projector is placed near a fluorescent light that can disturb the 

infrared remote controls�
Batteries are new and are not reversed in installation� 

Buttons on the projector cabinet do not work (only models with the 

[CONTROL PANEL LOCK] function)

[CONTROL PANEL LOCK] is not turned on or is disabled in 

the menu�
Still unchanged even though you press and hold the EXIT button 

for a minimum of 10 seconds�