Postby appleads » Fri Sep 18, 2015 3:35 pm
You've replaced all the expensive bits, which is why I suspect it's the ballast. Here's the order of "most likely to fail" that I've found after fixing about 15 or 20 Samsung DLP's as a "hobby" of sorts. First to fail, the lamp. Next, the ballast. Third, the capacitors on the power supply board. Fourth the color wheel. Fifth the DLP chip. Sixth one of the fans (although these don't have to stop, just under perform to fail) Seventh the DVI board, and last, the DMD board. That's been my experience but the sample size isn't all that large. I just brought back to life a 72 inch set given to me free of charge because the owner got tired of trying to fix it. He'd replaced every expensive component--lamp, chip, color wheel, dmd board). Turned out it had a bad ballast, and two bad capacitors on the power supply board. Once repaired, the picture was mind blowing. I spent $56 on parts and $100 on gas picking it up in the middle of nowhere.