NEC projector has yellow light on, but will not cone on

it seems the lamp is failing ,the price of the lamp is USD130
any questions, feel free to contact me
have a nice day!
Jerry,Lampdeng Limited

probably needs filters cleaning or a new lamp replacement.

yup,the bulbs gone

The NEC’s work on a reducing time basis, they count the hours that they have been operational and refer to this as the life of the bulb – 1600 hours. When the 1600 hours has been reached the projector shuts itself down into standby mode never to be restarted even after changing the bulb / filters. This is because the unit needs to be reset, which needs to be done as follows (not included in any of the bulb replacement instructions):-

• Plug Projector in so it is in standby mode – Orange light lit, Red status light lit (not flashing)
• Using the remote control, hold down the power off button for 30-45 seconds
• This will reset the status button, removing the red light
• Power up the projector and select Menu
• Select Projector Options
• Select Set-up – a number of tabs will appear called pages
• Arrow across the pages (MT850 is Page 5) until an option called “RESET LAMP HOURS” is shown
• Move onto this option and press enter on the projector itself, confirm that you want to reset the counter
• Projector is now back to life

This works for all NEC projectors, the page number may be different though where the “RESET LAMP HOURS” option resides.

- Unplug the projector for a full 4-5 minutes.
- Plug it back in and wait for the ready light and try it again.

If the above fails, replace the lamp.
If that also fails, it is likely a bad ballast.

Thanks,
Tor

Using the on screen menu, check the hue or wall color settings. [Hue]
Varies the color level from +/- green to +/-blue. The red level is used as reference. This adjustment is only valid for
Video, Component and TV standard inputs (not valid for RGB and DVI digital).


Using the Wall Color Correction [Wall Color]
This function allows for quick adaptive color correction in applications where the screen material is not white.
The following nine options are available.
• OFF • Blackboard
• Blackboard (Gray) • Light yellow
• Light green • Light blue
• Sky blue • Light rose
• Pink

if the projector is an lcd projector, the heat has caused burn spots on the light filter on the blue lcd. that needs to be replaced by the manufacturer. if it's a dlp projector, there are heat marks on the optics somewhere. also needs to be looked at by the manufacturer. nec, toshiba, and smart won't sell parts, so you'll have to send it in.

Hi,

I want you to see this document to troubleshoot your projector.
www.douglascollege.ca/__shared/assets/NECVT440K-540KMANUAL32259.pdf

Goto page no: 35 . It has information about status light messages and i hope it will help you.

Hope my info solves your problem,
Thanx for using fixya.

I can't imagine a setting that would cause this - It sound more like some sort of fault with the projector's blue LCD panel. (The image is created from a mix of red, green and blue light. If you loose the blue, everything will look yellow.)

Is it capable of showing any shades of blue?

Using any graphics or photo-editing software, create a solid blue image (R=0, G=0, B=255 in your colour settings) and if possible, display this full-screen. Is there any output from the projector at all when you do?

If not, it sounds like it need a professional repair.

Matt

hi 1) 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-16 and 17 in the manual http://www.fixya.com/user-guide/p155892,m5221,gm34/NEC-VT460-Multimedia-Projector.aspx 2) Ensure that the lamp cover or lamp housing is installed correctly. See page E-30. 3) Check to see if the projector has overheated or the lamp has reached the end of its usable life. 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 4) You have pressed control panel key when Control Key Lock is enabled good luck