My 3 yr. old 50' Samsung DPL HL-R5064W, works well generally but it will suddenly shut it self off, usually after a couple of hours - but and be faster. When it goes off the 'music tone' does not sound, so I eleminated somebody else using their controller and messing me up.The lamp was replaced [by a service tech] 2 months ago and this started soon after - could be related?I've check the usual suspects- timer, sitting on the controller etc. Also is there a way to check that the fan functioning properly.
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