Optoma GT720 Video problem - AVS Forum
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post #1 of 6 Old 03-17-2011, 09:47 AM - Thread Starter
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Hello Folks,

New to the forum and new to the projector world.

Plunged in and bought an Optoma GT720 on ebay new in October. Wow is has been life changing until about 3 weeks ago after a few hours the color starts to flicker and then goes to black and white, and then some color flashing in and out with an audible grind or mechanical issue of some sort.

Thought maybe it was an overheating issue, used a small fan in multiple directions..sometime it would clear and sometime not. Now it seems to go to this flickering and then black and white and then flickering after 5 minutes or so.

Opened a ticket with Optoma and they sent me a RMA form. I am not sure they will honor the warranty since I bought this on ebay. Was wondering if this symptom has something to do with the color wheel or overheating or design flaw?

Any help would be appreciated at least to know what to expect in case I have to pay for the repair myself. The bulb has 1600 hours on it now
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post #2 of 6 Old 03-17-2011, 11:14 AM
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My vote is for color wheel failure
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post #3 of 6 Old 03-17-2011, 11:17 AM
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The "grinding" noise and the flashing to B&W tells the story. Color wheel is failing. Can't tell you cost, that model isn't in my parts supplier's database.
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post #4 of 6 Old 03-17-2011, 01:56 PM - Thread Starter
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Thanks guys...saw on another thread that the part is not that expensive (HD20), how hard is it to change it out yourself?
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post #5 of 6 Old 06-02-2011, 09:33 AM
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Where do you find the color wheel part??

Change the color wheel is very easy, just remove de gt720 cover and there it is with 2 screws.
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post #6 of 6 Old 12-07-2012, 03:46 PM
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hello just perchased the Optoma 720 from ebay with a 115 hours. Watched two movies on projector than it shut down,the red light indicator is on and the amber is flashing. This projector is out of warranty,I would like to try to repair is my self optoma says its an internal problem. Does anyone have any ideas what could be wrong??? Thank you Del.
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