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It could be the temp sensor going bad. This sensor sits on top of the
metal housing which the bulb assembly slides into. The bulb assembly
will have a hole on top and this is where the sensor is above. There is a
small blue and white wire that plugs into it. If you pull the wire out
and put a paper clip or wire in the coupling you will basically bypass
the sensor connecting the blue and white wire. If your tv turns on then
that is your problem. Its cheap too. Here were my symptoms..1] Turn tv
on 2] Bulb would light up..(which eliminates the ballast) regular
picture would show up (which eliminates the bulb and color wheel) 3] 30
seconds later tv would shut down with 3 flashing lights. After bypass
the tv turned on as always and hasnt shut down yet. Always un plug tv
first. Get the replacement part to avoid overheating and possible fire
ballast or smps board (power supply board) or the main board. Had same problem, replaced lamp, ballast and power supply, worked for 2 weeks now front lights flashing again. ordered main board per samsung tech. support.
I'm not a TV repair guy but my owners manual states that when all three LED's or lights on the front of the TV are flashing, that the lamp needs to be replaced. Might want to look into this. Good luck!
Did you use an original replacement lamp or an aftermarket replacement? From the price you give, it sounds like an aftermarket lamp, which are notoriously buggy and the problem may be with the lamp. If not, the lamp driver is your next likely culprit. It is also called a lamp power supply or lamp ballast.
when turning on the set will go three startup cycles about 2-3 min. then all three leds will blink/ possible causes /lamp/ballast/dmd board check or purchase the dmd board last (costs) also listen for arcing from the ballest at startup and fan noise if you can and color wheel noise also.if you hear the ballast arcing and trying to fire the lamp look at the lamp.
Mine did that when the color wheel didn't spin up...just give it a whack where you installed the light & the wheel should spin up. I had to replace my color wheel as the bearing was shot & was buzzing all the time. The light won't come on if the wheel doesn't spin up first.
Power issues (Tv not turning on) were typically due to faulty ballast.
While the TV reports a bad lamp it is the ballast itself causing the
issue. Samsung is well aware and will replace both the ballast and the
lamp (since the lamp can be prematurely aged but the bad ballast).
After replacment most people stop having issues.