Flickering image and green hue on Optoma HD200x

This happens to my hd20 sometimes. just happened on pc through hd20. when i turned it on said 30hz instead of 60hz. so i changed resolution down then back up to 1920x1080 and it is sorted.
irving6000

THIS IS THE SOLLUTION allow about 2 hours. The optoma HD20p has a problem with the heat transfer paste drying out between the heat sink and the image processor. The repair is fairly involved but well worth the effort to do as it will restore your projectors performance and cost you about $2 in parts Step 1 go to your nearest electronics store and get a small tube of heat sink heat transfer paste. Step 2 you will need 3 Philips screw drivers 1 tiny, 1 small and 1 medium size tips, as well as a small flat blade screwdriver and a small artists paint brush. Step 3 Grab the grey plastic lense dial and wiggle and pull until it un clips Step 4 turn projector upside down and undo 3 Philips screws Step 5 work a small strait blade screw driver around the join of the top and bottom cover to release the plastic clips holding them together. Once separated unplug the control panel ribbon. OBSERVE THE ROTATING PLASTIC COLOUR WHEEL AT FRONT CENTRE -VERY FRAGILE Step 6 remove the electronic input processing board, after unplugging about 5 cables and removing approx 6 screws from the top and 4 screws from the back including the 2 nuts on the VGA socket this whole assembly will come out. Step 7 observe the main lense assembly with alloy heat sink attached to the back, find the 4 small Philips screws holding this in and remove Complete assembly including the colour wheel. Step 8 hold the assembly carefully and undo the 4 Philips head screws holding the heat sink to the image processor. Once removed take the heat sink off and remove all soft grey heat sink compound from the 10mm x 15mm surface as well as any debri on the processor. Step 9 apply a generous coating of new heat sink compound to the heat sink surface and re assemble the heat sink observing that the 4 screws protrude through the 4 housing holes rely on the 4 springs to apply the pressure on the heat sink. Step 10 use cotton buds and water to carefully clean the colour wheel. Step 11 place the lense assembly to the side and remove the micro cooling fan (2 screws) and thoroughly clean with a stiff 6 mm artists paint brush and blow out and re fit. Also clean any dust from the main cooling fan blades and blow out. Step 12 carefully re assemble all parts ensuring re connection of all leads including the big socket under the input processing board. Enjoy

After 20 minutes the image from my Optoma HD200x will start to flicker wildly and change colour to a green or blue hue, making it totally unwatchable. The unit is situated in a totally open area, so should not be overheating, and it's only 3 months old so shouldn't be failing at this point. Anyone had similar problems?

I've arranged this problem blowing in the interior of the projector with a drinking straw. You can use the ventilation holes to get into almost every pieces. Even in the space between optical and the body of the projector.

Note: the most probable reason for this to happen, is that the colour wheel has some dust particles.