I have an Optoma HD20 I have been using for 10 months now, with 1300 hours on the original lamp and with its HDMI 1 input provided by a PC ATI graphics card at 1920x1080 60Hz.
The projector is on a non-smoking house and in a temperature controlled room which rules out excess dust and overheating. None of the Temp-LED or Lamp-LED has ever been on. Also the lamp related settings are Bright Mode Off and High Altitude Off.
The projector is experiencing the color flickering problems which can be shown very clearly in the following video:http://www.youtube.com/watch?v=Uz3z129CDzk
The steps are (usually the procedure starts after the first 5 minutes of projector use):
1) The projector starts to rapidly change the tint/hue into red/green/blue.
(the original picture projected is still there, it just has a new tint/hue and not correct colors).
2) After 10-20 seconds, it settles in one of the tints and it continues to show the picture with the red/green/blue-ish tint/hue.
3) After 1-2 minutes, it repeats step 1 and 2.
4) Either the color is corrected for the rest of the use or the steps 1-3 reoccur after some time.
One observation is that while in step 1, if the power button is pressed once so that the menu screen "Power off the lamp?" appears, the problem is corrected for 1-3 seconds and then the tint/hue cycling starts again.
Also, if the input signal is disconnected by disabling the hdmi output from the pc so that the projector shows "HDMI 1 NO SIGNAL" the tint/hue is fixed on a redish tone after a few seconds and stays that way even if the input signal is reconnected.
Last possible short remedy is putting the projector's setting "High Altitude" to On which seems to prolong the time between the reccurences of the problem.
After searching around for a service manual or similar problems with the color wheel, I have found the following instructions:http://tantht.blogspot.com/2009/02/h...om-optoma.html
which do not apply directly to the problem at hand.
I would like to ask of anyone with similar symptoms to kindly share his experience in regard to this problem (maybe possible solution by cleaning the color wheel?) or with dealing with the Optoma Support in Europe.
Thank you in advance for your time.