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Have a problem with your NEC Display Solutions product? Our hints and solutions within the FAQ section offer fast online self-help for technical problems. You can search for all product relevant information. Please choose the corresponding product category on the right side and click on one of the questions related. If there isn´t  a sufficient answer to your question please do not hesitate to contact us directly (see contact data).

Why is my picture blurred despite using AUTO FOCUS?

Projectors with AUTO FOCUS (LT25, LT30, LT35, NP10, NP50 and NP60) always focus automatically.

However, if a digital image setting has been activated in your projector the image will always be displayed in interpolated fashion, which means you get a blurred image despite using Auto Focus .

To avoid this, deactivate all digital settings in your projector which could lead to an interpolated image. The following points should be noted concerning these digital settings:

a) If your computer runs at a higher resolution than the natural resolution of the projector then interpolation will take place. For instance, an SVGA projector requires an 800x600 computer signal, so any higher resolution such as 1024x768 will be interpolated to 800x600.

b) Ensure that you have an optimum set-up for the projection screen which does not cause any trapezoidal or keystone distortion which could render automatic or manual keystone correction (including 3D reform) necessary, as any such digital keystone correction would then interpolate your image.

Why can’t I focus my image?

Please check the following points to ensure that you obtain a properly-focused image on your projection screen:

Deactivate all digital settings which could lead to an interpolated image. The following points should be noted concerning these digital settings:

a) If your computer runs at a higher resolution than the natural resolution of the projector then interpolation will take place. For instance, an SVGA projector requires an 800x600 computer signal, so any higher resolution such as 1024x768 will be interpolated to 800x600.

b) Ensure that you have an optimum set-up for the projection screen that does not cause any trapezoidal (keystone) distortion which could render automatic or manual keystone correction (including 3D reform) necessary, as any such digital keystone correction would then interpolate your image, leading to the same effect as that noted in point a) above.

c) Deactivate the digital zoom. Otherwise your image will be interpolated (see point a) above).

Finally, you should of course make sure that the optical focus is correctly adjusted.

How can I project onto a non-flat screen?

With certain NEC projectors it is possible, with the aid of free software known as the GeoCorrection Tool, to project onto non-flat surfaces such as cylinders or corners. When doing so the 16:9 format is not supported.

To find out more about this go to: Geometric Correction Tool

WT600/610/615: Which rear projection screens can I use?

Due to the high 55° projection angle of the WT series only special rear projection screens should be used, because with conventional rear projection screens you get a hot spot.

The following companies offer solutions:

- has developed a special rear projection screen (the 55° projection angle HOPS.®). For further information please click on the following link:

- dnp has also developed a special rear projection screen ( dnpRGID UCS SCREEN). For further information please click on the following link:

How should memory devices for NEC projectors be formatted?

The memory device (flash memory card or USB memory device) must be formatted with the FAT16 or FAT file system. If formatted with FAT32 or NTFS it will not be recognised.

Where do the horizontal bars of interference you sometimes see come from?

When connecting a projector to a video recorder or DVD player you sometimes get a ripple effect, i.e., horizontal bars of interference running downwards over the image.

The system is earthed via both the aerial line and the line filter of the projector power supply. To suppress this ripple you need a sheath current filter high pass filter in each aerial line which does not allow the interference current through but does allow the useful signal to pass. The filter has the standard connector/coupling for an aerial line and is equally suitable for both radio and TV.

Test: unplug all aerial connectors, [and] when the ripple stops this filter is the right solution.

How do I permanently save my keystone settings?

Permanent saving of keystone settings (for horizontal, vertical and diagonal values) for all current NEC projectors:  

To permanently save your digital keystone corrections you first have to activate the 3D REFORM MEMORY in the EXTENDED MENU.

How to do this:


Now select the menu item SET-UP

and go to PAGE 4

There select the checkbox 3D REFORM MEMORY

and press the OK button.

Your horizontal, vertical and diagonal 3D reform (keystone) data will now be permanently saved.

What is the PC card slot for?

The PC card slot, which is situated on the projector main unit, allows you to make presentations without a PC. Just insert a compact flash or flash memory card containing your stored presentation material and display images directly onto a screen. The PC card slot means there is no need to transport a PC along with the projector. The projector will display JPEG, BMP, TXT and HTML (text only) files.

What are Keystone Correction and Automatic Keystone Correction?

Distortion occurring when the projector is not exactly perpendicular to the screen is called keystoning. To prevent this NEC has developed Keystone Correction , a digital technique for the correction of keystone distortion, replacing it with a sharp, rectangular image.

Automatic Keystone Correction adjusts images distorted, either upwards or downwards, due to being projected at an angle. The integrated sensor detects the vertical inclination of the projector up to an angle of +/- 30 degrees. This feature enables the projector to be set up quickly and easily.

What is 3D Reform?

The new NEC chip is the outcome of exhaustive research by NEC Viewtechnology, the company which developed ASIC scaling for converting pixels. Separate algorithms manage the vertical, horizontal and diagonal correction, giving you more freedom to position the projector wherever you want.

A newly-developed NEC chip provides 3D reform, a keystone correction feature which eliminates trapezoidal distortion. Whereas conventional ‘up-down-left-right’ correction functions are unable to eradicate this kind of distortion, 3D Reform delivers vivid, sharp image projection. If the projected image is distorted, all you have to do is click on the four corners of the screen to activate the keystone correction function, whereupon a rectangular image will be restored. This gives you new freedom in positioning the projector as it can now be placed at an angle to the screen, rather than having to be positioned directly in front of the screen where it may impede the audience’s view.

Projection angles: [up to] 40° vertical and 30° horizontal (25° with the LT240 / 220)

What is AUTO 3D Reform?

AUTO 3D Reform automatically adjusts the image size to the screen size.

The image sensor detects the position and shape of the screen and automatically adjusts the image to fit the screen. This eradicates the time-consuming entering of settings and offers you increased flexibility when positioning the projector, allowing the presenter to concentrate on the actual conference or presentation.

What is Auto Wall Colour Correction?

Auto Wall Colour Correction enables you to make your presentation on a wall or whiteboard, thus eliminating the need for a screen. In fact, you can use almost any suitable surface and the MT1065 or MT1060 will still display stable, beautiful images. When projecting images onto a coloured wall the Auto Wall Colour Correction feature automatically adjusts the image colours at the simple press of a button. To detect the colour of the wall onto which the image is being projected the projector emits a test pattern made up of white (W), red (R), green (G) and blue (B) light, and an image sensor then detects the colour of the projected test pattern. Auto Wall Colour Correction means your presentation can be reproduced on any projection surface and you still get wonderfully sharp, vivid images.


Whereas the focus is adjusted manually on conventional projectors, the Auto Focus function of NP40/50/60 projectors means adjustment is automatic. The projector’s integrated image sensor determines and automatically adjusts the focus to create a clear, sharp image, allowing you to concentrate on your presentation rather than having to waste time fiddling with settings.

What memory cards can I use with my projector?

To present your digital images or stills using an NEC projector you can use the following memory cards:

- Compact flash cards (with a Type II PCMCIA CF adapter) 

- SMART MEDIA (with a 4-in-1 Type II adapter)

- MEMORY STICK (with a 4-in-1 Type II adapter)

- MEMORY STICK PRO (with a 4-in-1 Type II adapter)

- MULTI MEDIA CARD (with a 4-in-1 Type II adapter)

- SECURE DIGITAL (with a 4-in-1 Type II adapter)

How can I control my projector?

Almost all our projectors can be controlled via the RS-232 interface.

To find the necessary control commands for our current products please go to: RS-232C Commandlists for Projectors

Why won’t my projector display video images from my notebook?

If you want to use a notebook with video output, whether to display directly from a DVD or run a video clip within a PowerPoint presentation, you first have to switch off the notebook’s internal LCD MONITOR via the Fn + F3..F10 keys, so that only the external monitor is active.

However, you have to do this before starting the presentation as otherwise your notebook may crash.

Please also refer to Question 19, ‘Why won’t my projector display computer images from my notebook?’

When using Notebooks the external monitor output on the notebook’s VGA connector must first be activated.

Depending on the notebook this is done using the key combination: Fn plus F3..F10. (if necessary check this in your notebook’s manual).

These special function keys are colour-coded on your notebook keyboard (yellow, blue).

The Fn key is located between the Ctrl and Windows/Alt keys in the bottom left-hand corner of your notebook keyboard.

The monitor output function key is usually indicated with an LCD /CRT symbol or lettering on the F3..F10 keys.

Now press Fn + F3..F10 button to access the following:

Option 1: switches on both the internal LCD monitor and the external monitor output; 

pressing again accesses

Option 2: switches off the internal LCD MONITOR leaving only the external monitor on. This is recommended since the notebook’s graphic chip will now transmit correct VESA timing to the beamer;

pressing again accesses:

Option 3 (standard): the external monitor output is deactivated, leaving only the internal LCD monitor active.

What happens if the projector malfunctions?

NEC offers a pan-European service . This free service is available for three years under the warranty for NEC projectors.

Contact details are provided here in Support under the menu item Service Hotline .

Are there any other useful functions?

Yes. The PC Card Viewer and the Blackboard Function, for instance. Projectors equipped with the PC Card Viewer feature are particularly suitable for mobile use since you do not need a notebook or PC to make a presentation. Instead, you can take your presentation along with you stored on a normal PC card or Compact Flash card. Meanwhile, the Blackboard feature allows you to create drawings via the USB mouse and project them onto a screen, facilitating interactive presentations and audience rapport.

Can the projectors also be used home cinemas?

Yes. NEC projectors are fitted with inputs for video and S-Video, thus meeting standards such as NTSC, PAL, SECAM, 4.43NTSC & PAL60.

You can select the following connection types: VIDEO, S-VIDEO and COMPONENT (YUV) Signals.

The following SCART options are also available:

SCART VIDEO (yellow Cinch connector), SCART SVHS (4-pin connector), SCART RGB (via the VGA input), SCART YUV (via the VGA input).

Furthermore, all projectors are PAL Progressive-enabled (via YUV or RGB).

The latest NEC projectors produce virtually no irritating fan noise. The VT series is ideal for home cinema use as it offers outstanding value-for-money in this highly price-sensitive segment.

What is the difference between DLP and LCD technology?

Most projectors use LCD technology. This splits light into the primary colours red, green and blue. Each colour is then directed through an LCD display acting as a ‘light valve’ and the light is then reassembled. There is an LCD display for each individual pixel and each primary colour. DLP technology involves the use of huge numbers of tiny quadratic mirrors arrayed on a Texas Instruments DMD chip. Only when a mirror is tilted will it reflect the light shining onto it back towards the screen. This very high-frequency switching on and off of points of light is not perceived by the human eye and allows different shades of colour to be portrayed. The colours are generated by a colour ribbon featuring the primary colours red, green and blue.

What are the respective advantages of these technologies?

LCD technology is characterised by a high degree of colour saturation and homogeneous illumination. It is very reliable and excellent value for money. DLP technology provides highly realistic colour reproduction with no annoying pixelation. One-chip DLP technology permits the construction of the smallest and lightest projectors, such as the LT150, whereas three-chip DLP technology is used for high-performance projectors such as the XT5000, SX60000 & XT9000 due to its high luminous efficiency and outstanding image quality. To ensure that you can obtain the ideal projector whatever your requirements, NEC offers projectors using both technologies.

How can I calculate the distance from the projector to the screen?

By using the projection factor of the lens. This indicates the distance the projector should be placed from the screen in order to achieve a given image width. An example: with a projection factor of 2:1 the projector should be placed 4 metres from the screen in order to achieve an image width of 2 metres. In standard 4:3 mode this would mean an image height of 1.5 metres. To simplify calculation NEC has provided a configurator on the Internet at . Using different lenses, for instance rear projection or telephoto lenses, increases the projectors’ range of use.

How big should the screen be?

The screen size should reflect the fact that the distance between the viewers and the screen should be no less than 1.5 times the image width and no more than 6 times the image width. However, projectors with zoom or replaceable lenses give you greater flexibility. The projection factor determines the ratio of screen width to distance between projector and screen. This allows you to work out which projector placement makes optimum use of the available projection area.

How do I change my monitor's refresh rate in Windows?

1. Access the System Settings menu

2. From there, select the CONTROL PANELS folder.
3. Double click on the DISPLAY icon in your Control Panel.
4. Click on the SETTINGS tab.
5. Click on the ADVANCED button.
6. Click on the ADAPTER tab Select the preferred refresh rate in the drop down box.

How can I avoid burn-in (image retention)?

Recomendations for optimizing operations of NEC Public Displays

  • Content should not be of static nature. (Image retention is not covered by warranty.)

  • Operating temperature should be as low as possible. (Ideal: room temperature)
  • If possible, reduce brightness. (Reduces wear on the LCD panel and minimizes power consumption.)
  • Where possible minimize the contrast of the content. (Sharp black / white contrasts should be avoided.)
How do I change my monitor's refresh rate using a Mac?

1. Access the System Settings menu.

2. From there, select the Monitors folder.
3. Select the preferred resolution and refresh rate in the drop down box.

Where do I get a Windows .inf file, and how do I install it?

Monitors don't use drivers but, rather, there is a monitor information file used by the operating system to implement the Plug & Play feature of Windows.

You can download the Windows setup file from Display Drivers - LCD Downloads

  1. Download the ZIP file from the category “Drivers” to your hard drive.
  2. Create a new folder on your hard drive and extract the ZIPPED files to it.
    Note : If you do not have a zip utility you can download a shareware version of winzip from
How do I adjust my monitor's image?

This depends on the model. All of our monitors come with a user manual that will step you through the changing of the screen's size and position.

If your manual is not available, you can find it in our Product Support .

Why do I only get 16 colors as my choice for colors OR why is my only resolution option 640x480?

This issue has to do with the video card in the computer, not with the monitor. The monitor will do umlimited colors but it's the video card and it's driver that give you those choices.

We would recommend installing the latest drivers for your video card.

What do I do if my monitor's power light is orange, but I don't see anything on my monitor?

This typically indicates that the monitor is not receiving a video signal from the video card in the computer. You should verify that the card is the problem by trying the monitor on a different, working system. If you still do not get an image, please contact our support, the monitor might be defect.

The image on my display is flickering. How do I correct this?

Please refer to the monitor’s manual for the recommended refresh rate with your set resolution and adjust it accordingly.

What can I use to clean my screen?

Clean the LCD monitor surface with a lint-free, non-abrasive cloth. Case of persistent dirt, wipe with cloth permeated by water, ethanol, isopropyl-alcohol completely. Avoid using any cleaning solution or glass cleaner (ex Acid, Alkali and Acetone).

A special coating is provided on the glass (CRT) surface of this monitor to reduce a reflection and static electricity on the glass surface. Due to the delicate coating on the glass surface, use a lint-free, nonabrasive cloth (cotton or equivalent) and a non-alcohol, neutral, nonabrasive cleaning solution to minimize dust. If the screen requires more than a light cleaning, apply water or soften neutral detergent with much water directly to a soft cloth and use it upon wringing water, to clean the glass surface.

Why do images and fonts on my LCD look choppy and/or blurry?

Unlike CRT displays, the LCD panel has a fixed pixel format over a set area. In order for LCD 's to expand resolutions to full screen an interpolation must be performed. When the interpolated resolution is not an exact multiple of the native resolution some lines appear thicker than others. Please refer to the display manual for the optimum resolution.

If your manual is not available, you can find it in our Product Support.

How do I use the On Screen Menu?

NEC Display Solutions sells a wide variety of monitors. We use different versions of OSM’s (On Screen Manager) depending on the features of the monitor. Please refer to the manual for detailed instructions for the OSM usage.

How do I remove the “Resolution Notifier” message?

To permanently turn of the “Resolution Notifier” message Bring up the OSM. Go to the “TOOLS” tag depending on the monitor there may be one or two tools tags If there are two go to the second tag. Under the “TOOLS” tag select the symbol. This is the “Resolution Notifier” setting. Use the < > buttons to set the Notifier to OFF.

What are dead pixels in LCD displays?

The manufacturing process for LCD displays requires millions of transistors in each panel. Limitations of the manufacturing process sometimes result in dead pixels. A "dead pixel" can take the form of either a contrast spot or a black spot. A contrast spot appears when a completely gray screen is displayed. A black spot appears when a completely red, green or blue screen is displayed.

Why will my monitor not power on? (Vacation switch)

If your monitor will not power on, the first thing to check is the “vacation switch”. The vacation switch will be located on one of the sides of the monitor or on the bottom for our larger monitors (above 30 inch). Make sure this switch is in the ON “ I” position. Many NEC Display Solutions monitors are made with vacation switches. The vacation switch enables the monitor to be turned off completely.

When powering on the computer, I get an “Out of Range” error message. The computer goes into safe mode and I cannot get anything to work right. It will not enter back into normal mode. What can I do?

The monitor will display an OUT of RANGE message when the output of the video card in the computer exceeds the monitor's capability. The easiest solution is to get to a point where you can reload the drivers for the monitor.

Reset your monitor to its default settings.

1. Restart Windows in “Safe Mode”

2. Click Start, then select Settings, then Control Panel. The Control Panel window opens.
3. Click/Double-click the Display icon. The Display Properties window opens.
4. Click the Settings tab.
5. Click Advanced. The Advanced Display Properties window opens.
6. Click the Monitor tab.
7. Click Change. The Select Device window opens.
8. Select Plug and Play monitor (VESA DDC) by following the on-screen instructions.
9. Restart Windows.

After the default driver is working reload the drivers for you monitor

Aperture grille wires...what are they? (Two faint horizontal lines in the image.)

This is not a defect, the lines are built into the CRT. The MultiSync FP and FE series monitors use an aperture grille CRT. This type of CRT has thin vertical color stripes that run from the top of the screen to the bottom. The color stripes are separated by a thin wires that make up the grill. The horizontal lines you see are shadows of two horizontal damping wires used in this type of CRT to maintain image stability.