OK - I've fixed mine (so it looks) - loads of dust inside unit seemed to caused the problem - vacuuming vents (as the manual prescribes) just shifts all the dust inside around and obviously causes some disruption.. solution - remove 4 screws underneath and lift off top (carefully) remove side panel screws (where Av inputs are) again carefully. Now go around each vent at the front, side and underneath and give areal good blow in each a few times. Plumes of dust and rubbish fly out - keep going until it's all clear. Reassemble and fingers crossed. Mine then started up and didn't turn off - there's a horrible burning smell (dust settling near lamp I presume) which is now fading. Been working 30 mins now with no trouble!
Hope it works for you - will post another update if I have any further problems - no news is good news!
hi, first of all check the tint setting on your projectors picture menu. if not get the correct color then, your projector is a dlp projector that means it have a color wheel in side. if the synchronization of color wheel is not correct this problem can occur. there is a sensor for couting the rpm of color wheel. also have a black mark on the color wheels rotating portion. the sensor scene this black mark for making count. if there is any dust in that portion it will make difficult to the sensor making the counts. you have to remove the color wheel to clean the same. i have added a video how to clean the color wheel . not the same projector. ok
the power supply is bad and need to be replaced. you can get the part and do it yourself, or send it to a sharp service center. either way, try av solutions in ny. they're really good. www.avsolutionsny.com