Manual for MT800

Name: Manual for MT800
Brand: NEC
Availability: InStock

Brand: NEC

Category: Other

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 7:09 p.m.

Warranty Information

Refer to the manual for detailed warranty information.

OFF: Normal
On Continually: Projector lamp has exceeded 2000 hours and needs replacement.
Blinking Slowly: Check and clean the air filter. Ensure the filter panel is installed correctly. Wait one minute before using the remote.
Blinking Rapidly: Projector is overheated. Allow the fan to run for two minutes before unplugging. Check the filter. Ensure adequate ventilation. Allow at least five minutes before turning back on. Contact dealer if the problem persists.

Does not turn on: Check power cord, power switch, and air filter installation.
No picture: Check status light for overheating, select correct source, ensure cables are connected, adjust brightness/contrast, remove lens cap.
Image isn't square: Reposition projector, adjust focus.
Picture is blurred: Adjust focus, reposition projector, check distance to screen.
Image is scrolling: Select desired input source.
Remote control does not work: Install new batteries, ensure no obstacles, and stay within range.
Status indicator lit or blinking: Refer to Status Light message chart.
Cross color in RGB mode: Adjust "Auto Picture" settings.

Condition	Status
OFF	Normal
On Continually	The projector lamp has exceeded 2000 hours of operation and should be replaced.
Blinking Slowly (Once a second)	Check the filter and clean it if necessary.
	Ensure that the filter panel is installed properly.
	Wait one minute before using the remote control. Otherwise the lamp may not go on.
Blinking Rapidly (4 times a second)	The projector is overheated. The lamp turns off automatically. Allow the fan to run at least two minutes before unplugging the projector.
	Then check the filter and clean it if necessary. 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.
	In either case, allow at least five minutes before turning the projector back on. If the problem persists, contact your NEC dealer for service.

Problem	Check These Items
Does not turn on	Check that the cord is plugged in and that the power switch on the back panel is on. Ensure that the air filter and filter panel are installed correctly. (See page 43.)
	Check the status light to see if the projector has overheated.
No picture	Use the menu icons to select your source (Video, S-Video or RGB). (See page 36.) Ensure your cables are connected properly. Use icons to adjust the brightness and contrast. Remove the lens cap.
Image isn't square to the screen	Reposition the projector to improve its angle to the screen.
Picture is blurred	Adjust the focus. (See page 17.) Reposition the projector to improve its angle to the screen. Ensure that the distance between the projector and screen is within the adjustment range of the lens.
Image is scrolling vertically, horizontally or both	Use icons to select the source you want to input.
Remote control does not work	Install new batteries. (See page 44.) Make sure there are no obstacles between you and the projector. Make sure you are within 23 feet (7m) of the projector.
Status indicator is lit or blinking	See the Status Light message chart on page 49.
Cross color in RGB mode	If "Auto Picture" is off, turn it on. If "Auto Picture" is on, turn it off and balance the image with the Picture Adjustment icon and Fine Picture Adjustment icon.