Question about Optoma HD72 Multimedia Projector

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Projector problems Hi there. I have a problem with my Optoma hd70, after 1-2 hours it starts to flicker in colour shifting from blue, green etc. and after awhile it turns itself off. Its connected to my PC with a VGA-cable and to a DVD with HDMI. The standby/on led is green and the led for the lamp shines red. If i restart the projector it starts normal again. I have tried reset it in the menu. Is this the first signs that the lamp is "dying"? The lamphours is about 1700 hrs. Best regards, Christer Olsson.

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  • FrustratedTC Nov 14, 2008


    I just bought a new Infocus 2102EP projector and connected it to my laptop. After some time (that length of time varies from 1-2 hrs to 30 minutes or even upon startup) the color of the projected image only (no color change is seen on the laptop screen) changes to blue-green only (no red or magenta). Thinking that the problem must be with the projector, I called Infocus' Tech Support and they told me that the problem must be either with the cable (VGA) or my laptop, not their projector since it is a DLP projector. Since I've used this laptop for other presentations and have not seen the problem, I decided to return the projector. Amazon sent me a new projector (and cable) one and, frustratingly, I have the same problem!

    I can't think what it could be. In my efforts to fix the problem, I've tried to change the NVIDIA settings on my computer. Strangely, when I click around within the NVIDIA control panel, the projected color sometimes changes (either returns to normal or from normal becomes blue-green). But, I haven't found a solution to the problem- the NVIDIA control panel seems to affect the color, but its never a permanent fix.

    Projector geniuses, your help would be much appreciated!



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Hi, I have an Optoma EzPro 751 that had a similar problem, although it got progressively worse until it only took about 5 minutes to begin acting up. I was really frustrated, as the bulb only had around 600hrs at that point and the picture was bright. After some searching of forums like this, I found someone else with the same exact problem, but with a Dell projector (made by Optoma).
The culprit was LOTS of dust, built up on the circuitry, built up on the optics, built up everywhere! Solution: carefully open up the case and use canned air or an air compressor with a blow nozzle attachment. (warning-compressor air MUST be filtered first as it otherwise contains moisture and other harmful suspended contaminants)
I was at the end of my rope, and this really worked for my problem. It's worth a try, but BE CAREFUL! There are delicate parts in there you don't want to blast apart with air. If you use the cans, buy several as it took me quite a bit of blowing with a compressor regulated at 90psi to get it all out. Good luck!

Posted on Aug 11, 2008


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