Question about NEC VT47 Multimedia Projector

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Display is shaking

Hii


my projector was working gud since 4 years but all of a sudden the letters on the display are shaking can you tell me what is the problem , is it i need to replace the lamp because of the filament is shaking thats why the letters are shaking.

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  • mattysmadwor May 11, 2010

    Hi! I have the same problem but all i do is press the auto adjust button under the computer button. If that doesnt work then you can just press the computer button again and see if that helps.

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More likely your settings. It maybe interlaced mode, try changing the resolution/refresh rate. there is nothing else that will cause the shaking you described.
There is another shaking that can come from the heat given off from the projector, but this sounds like a settings problem.

Posted on Aug 31, 2009

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Posted on Jan 02, 2017

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Hi,
To reset the lamp hour of Toshiba TLP791, do the following.
1. Turn-off the device by pressing the "ON/STANDBY" and unplug the power cord.

2. In the meantime, hold down buttons "ON/STANDBY", "MENU" and "INPUT and plug-in the power cord .

3. The lamp operation counter will automatically turn to zero.

4. Check if the lettering "0H" appears on the lamp operation counter in the status display.

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Delay/ whitescreen when projecting video from laptop


1.
Connect the external display port on your laptop computer to the projection system, and then turn on the projector. For information about connecting external devices to your laptop, see the documentation for your laptop computer.
1.
Set the display resolution of your laptop computer to match the resolution of the projector system. First, on your laptop, open the Display Properties dialog box by using the Display icon in Control Panel, and click the Settings tab. Then, in Screen resolution area, move the slider to adjust the display resolution of your laptop. If you don't know which setting to choose, try 800 x 600 pixels; this is a common setting for many projector systems. YOURS sounds like 640x840.
3.
If you have audio in your presentation, connect a cable from your laptop's audio output jack to the audio input jack on the projector, and then test the volume by playing a file that contains sound.
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Start the Player on your laptop. If you want to only display the Player on the big screen, and not the desktop background, maximize the Player or set it to play your video using the entire screen (full-screen mode).

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4 Answers

Presentation mode is off...


I'm going to guess that you have a wide screen Dell laptop with a 16:10 aspect ratio and a default resolution of 1280X800. The wide screen is great BUT most presentation grade projectors do not have a native (pixel for pixel) 16:10 mode. Instead they still prefer a display input with a 4:3 aspect ratio like your old square CRT or standard definition TV. Why do they prefer a 4:3 input? Mainly because Powerpoint prefers to display a slideshow in a 4:3 mode. Because of this Dell, in their infinite wisdom, created the 'presentation mode' utility in an attempt to automatically convert the VGA output of your laptop from 16:10 to 4:3 on the fly. In my experience this is an annoyance at best and at worst can seriously impact the size and quality of the projected image.

The best thing you can do when you connect to a projector is ignore the presentation mode alert and manually set your laptop's resolution to 1024X768 for an XGA rated projector or 800X600 for an SVGA rated projector. This will cause your desktop to look stretched on your laptop but will give you by far the best projection image.

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