Question about InFocus LP70+ Multimedia Projector

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InFocus LP70 color problem

We have an InFocus LP70 at work. It displays the image with a yellowish, sepia color. For a fraction of a second the color appeared correct, then went back to yellowish. Is this a problem with the color wheel?

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No it's not the color wheel. If the color wheel stalls the lamp will shut off immediately which is a built in protection mechanism. On the LP70 and 70+ there is a multi pin connector inside located at the rear lower left of the projector. This connector connects the main board to the DLP engine electronics. This connector is horizontal and approx 2 1/4" wide and 1/4" thick and about 100 pins. I have seen this connector not seated completely and many various video artifacts occur (even the one you describe) If you or someone you know is electro-mechanically savvy it's not difficult to open the projector and make sure this connector is seated properly.
You will need a TORX T8 screw driver.

Cheers

Posted on Jan 16, 2010

  • Ed Rivera Dec 18, 2012

    Thank you for the suggestion. I used a thin 12" ruler to carefully push the circuit board in which I could actually see was not square with the horizontal board. The projector work great now. Thank you

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Try resetting the settings to factory default through the menu. if there's still a problem, take the cover off. if you look from the back of the machine, inside on the bottom left, you'll see the main board attached by a large white plug. use something thin and non-metalic to push the bottom of the board towards the plug to tighten it. now do the same to the other side of the plug. this should solve it. if it doesn't, you need to replace the main board.

Posted on Jun 05, 2009

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Posted on Jan 02, 2017

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I'm on Ebay - gtitubro if you want to contact me through there.

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in order for the lamp to strike and stay on, the fans and the colorwheel must be spinning and up to speed. if you remove the lamp and start it up, see if the 2 fans are spinning. and look inside to see if the colorwheel (a colored glass disk) is spinning. you'll also be able to hear a high-pitched squeal coming from it. unfortunately, you'll need to take it in to a repair center to have them replaced.

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Assuming that you've made sure that the cable connections are solid at both ends, there is a simple test to verify that this is a cable issue and not a costly projector issue. While the image is tinted green, open the menu. If the menu colors appear fine while the rest of the image is still tinted green it's the cable.

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