Question about ViewSonic PJ755D Multimedia Projector

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Image flickers I just replaced what I thought was a bad bulb because the image flickered. New bulb, same problem. I dusted the unit because I understand dust will sometimes cause issues. Also, the unit makes a slight popping sound on occasion. Any recommendations? I am having a difficult time getting an answer from Viewsonic.

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It sounds like the socket that the bulb goes into has an intermittant connection problem, or where the wires attach from the bulb socket to a plug or printed circuit board connection, or possibly a bad connection in the bulb driver circuit. Good Luck.

Posted on Mar 19, 2007

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DONT THROW AWAY YOUR BULB JUST YET!!! IT MAY BE THE COLOR WHEEL!

I have an optoma hd70 and was having the same problems. I also tried the "dust blob" tutorial, but unfortunately it did not work for me (and I ended up getting dust on the lens I couldn't get off myself). I started searching on the net for more answers and found some information regarding the angling of the projector. Apparently, if you tilt the projector with the back raised too high, the ventilation system does not work properly and this increased amount of heat damages the color wheel inside (this causes the wheel not to spin correctly and display a flickering effect...and that's also why it works for a few minutes on start-up but then gets too hot and the wheel skips and creates the flicker).

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