Question about Samsung HL-S7178W 71 in. HDTV Television
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Posted on Jan 02, 2017
The random whit dots you are seeing is more than not the DMD or million little mirrors board. The white spots represent some of the mirrors that are sticking in the on position. In that case they are always reflecting white light from the lamp. I don't concider the DMD board a do it yourself repair since on the older DLP set it requires mechanical alignment as well. The best thing to do is contact a techincian and see what they might charge to repair the TV for you. Please take a few moments to rate my answer...Thanks..
Posted on Nov 22, 2009
Here is Fan part# BP31-00024A. Search google, find it at various places.
Light engine assembly has to be removed. This involves unplugging various connectors between processing/control chassis on the left side and engine assembly on the right side. Mounting screws on the top and bottom of engine assembly. Then remove light engine assembly completely from the TV. Fan#2 is the lamp cooling fan and is located beside the lamp assembly.
It is not too complicated if you draw a picture of where all the plugs are removed from. If one plug is not put back correctly, unit will not work. Usually a tight fight sliding out the engine. Plastic cable tie-down between the 2 assemblies can be cut and discarded, this makes re-installing light engine considerably easier.
Cheat the cabinet safety switch with tape or stretch connecting wire across it to hold it in "on" position for test after reassembly.
Service cost may be $150-$200 if you don't do it yourself. We do it in most Canada cities.
Posted on Apr 23, 2010
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
Posted on Aug 11, 2011
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