A discolored Blob or blotchy pattern usually in the center of the screen. the problem is becoming all too common with Hitachiprojection sets. What happens is that one of the lenses in the optical block (or light engine) starts to burn (in thi scase the blue one) or discolor due to overheating because of a blocked air filter causing poor air (cooling) circulation. Nothing can be done when the damage is too far-gone except to replace the light engine-at a cost that makes it not worth repair. if the damage is minimal than to reduce further damage, the air filter should be replaced. The Light engine needs to be removed in order to replace the air filter. Be sure to vote/rate me if this helped Thanks!
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