Reviving this thread for a similar issue...
I think my color wheel is going out on my HD70. The symptoms:
1) The projector turns on fine and the image is sharp and vivid.
2) After about 20 minutes, the projector image flashes with different colors. The image is still visible, but the colors are wrong.
3) A few seconds later, the projector gives a brief whine... then it shuts down and the warning indicator shines a solid orange.
4) The projector is unresponsive to the remote. I have to unplug and replug, then it will start up again, although it takes about 5 minutes of start-up attempts before it will display an image. Then back to step 1.
Any idea if this is a color wheel problem or a lamp issue? Or maybe something else? The lamp has about 1200 hours on it. I bought the projector used about a year ago, and a new lamp or color wheel would cost more than the projector did... so I'm not sure if I would try to fix it unless I was sure of what the problem is.
Also, is there an online guide to taking the HD70 apart?
Any info would be appreciated...