Join Date: Jun 2006
Location: Minneapolis, MN
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I've had a G-90 since early 2001. It has always flickered like yours with explosions and other very sudden extreme changes in brightness ( ie; dark room opens the door to direct sunlight, etc.). My sources back then were 1080i HD satellite over component and DVD over component. The dealer said the projector wasn't capable of 480p without a new card, so he put in a 480P component card for the DVD player and that fixed the problem for DVD. When Bluray came out I got an HDMI 1080P card (from J. Wachman? sorry I might have the name wrong, but he was from France, and his card did the same thing as the Moombe card.) The 1080P card works great, no problem with sudden brightness changes, just like the 480p card. So now, the only problem I have is with the satellite at 1080i component. I tried 1080i over the HDMI and it really did not like that.
I've asked, but nobody seems to have a definitive answer as to what cause this. Signal overload causing loss of sync, or something? I confess, I don't understand, or know how the thing works. I usually watch DVD/Bluray, so its not an issue. If I watch HD satellite sporting events there is rarely an issue, unless the camera operator accidentally pans over the sun or something.
Sorry, I know this isn't of any help, but like yourself, I'd like to know what causes it. I hope this puts your mind at ease that this issue is not a warning of impending doom for your projector.