Nec projector troubleshooting

As for any digital appliances, breaking- downs are typical for projectors. The malfunctions of projectors are related to non-compliance with the rules of their service: physical impacts, contacts with dust or moisture. The information below from our troubleshooting table with faults` codes for Nec projectors will help out specialist to determine and remove the cause of a breakdown, as projectors are very complex appliances.

SymptomTo be Checked
Power is not on.• Verify that the power cord is connected.
The projection lamp does not light.• Verify that the lamp has not blown.
• Verify that the lamp unit cover is installed.
• Verify that the air filter is installed.
• Verify the internal temperature. The lamp does not light due to a protection control if the temperature is too high.
• Verify that the lamp usage time is less than 1500 hours.
No image is displayed.• Verify the selection of the connected input.
• Verify that the cable for the connected device is appropriately connected.
• Verify sure that Brightness or Contrast in the Image Adjustment menu is not set to minimum.
• Verify that the resolution on the PC is correctly set.
• Verify the functions of the PC.
The image is distorted.• Verify that the projector is placed properly.
• Keystone compensation may be applied.
The image is blurred.• Check the focus.
• Make sure that the projection distance is within the focusing distance.
• Keystone compensation may be applied.
• Verify whether the lens cap is on.
The image is flickering.• Adjust Phase in the Sync Adjustment menu.
The image is out of alignment.• Check the setting of the Sync Adjustment menu.
The color is out of alignment.• Adjust Phase in the Sync Adjustment menu.
No sound.• Make sure that the setting in the Volume menu is not set to minimum.
The cabinet produces a cracking sound.• A sound is produced when the cabinet slightly expands or contracts due to the changes in the room temperature. This will not affect projector performance.
The TEMP LED lights up or blinks.• Follow the procedures for protection against overheating.
The LAMP/COVER LED lights red.• Make sure that the air filter is not disconnected.
• Make sure that the lamp unit cover is in place.
• Check whether the lamp usage has exceeded 1500 hours.
The remote controller does not work.• Make sure that the battery is not blown or worn.
• Make sure that other light from lighting, for example, is not entering the remote control sensor.
• Make sure that the remote control sensor of the main unit is not obstructed.
• Make sure that the projector is not installed near inverter-driven equipment.
The image may not be positioned correctly or the display may be compressed, when personal computer input is selected.
• Press the RESIZE button to do automatic synchronous adjustment.
• Make adjustments on the "Synch adjustment" menu.

NEC HT series projector troubleshooting

ProblemCheck These Items
Does not turn on• Check that the power cable is plugged in and that the power button on the projector cabinet or the remote control is on. See pages E-17 and 18.
• Ensure that the lamp cover is installed correctly. See page E-43.
• Check to see if the projector has overheated or the lamp usage exceeds 2100 hours (up to 3100 hours: Eco mode). If there is insufficient ventilation around the projector or if the room where you’re presenting is particularly warm, move the projector to a cooler location.
• The lamp may fail to light. Wait a full minute and then turn on the power again.
• The lamp has reached the end of its usable life. Replace the lamp.
No picture• Use the SOURCE button on the projector cabinet or the VIDEO, the S-VIDEO, the COMRV (COMPONENT), the COMP. (COMPUTER), the DVI or the VIEWER button on the remote control to select your source (Video, S-Video, Component, Computer, DVI (DIGITAL) or Viewer). See page E-19.
• Ensure your cables are connected properly.
• Use menus to adjust the brightness and contrast. See page E-29.
• Remove the lens cap.
• Reset the settings or adjustments to factory preset levels using the Reset in the Menu. See page E-37.
When using with a notebook PC, be sure to connect between the projector and the notebook PC before turning on the power to the notebook PC. In most cases signal cannot be output from RGB output unless the notebook PC is turned on after connecting with the projector.
* If the screen goes blank while using your remote control, it may be the result of the computer's screen-saver or power management software.
* If you accidentally hit the POWER button on the remote control, wait 90 seconds and then press the POWER button again to resume.
Image isn't square to the screen• Reposition the projector to improve its angle to the screen. See page E-19.
• Use the 3DReform function to correct the trapezoid distortion. See page E-20.
Picture is blurred• Adjust the focus. See page E-20.
• Reposition the projector to improve its angle to the screen. See page E-19.
• Ensure that the distance between the projector and screen is within the adjustment range of the lens. See page E-12.
• Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned on. Should this happen, let the projector stand until there is no condensation on the lens.
Image is scrolling vertically, horizontally or both• Use the SOURCE button on the projector cabinet or the VIDEO, the S-VIDEO, the COMP.V (COMPONENT), the COMP. (COMPUTER), the DVI or the VIEWER button on the remote control to select your source (Video, S-Video, Component, Computer, DVI (DIGITAL) or Viewer). See page E-19.
• Adjust the computer image manually with the Position/Clock in the Image. See page E-32.
Remote control does not work• Install new batteries. See page E-10.
• Make sure there are no obstacles between you and the projector.
• Stand within 22 feet (7 m) of the projector. See page E-10.
Indicator is lit or blinking• See the Status Indicator on page E-45.
Cross color in RGB• Press the AUTO ADJUST button on the projector cabinet or the AUTO ADJ. button on the remote control.
• Adjust the computer image manually with the Position/Clock in the Image. See page E-32.