Question about Mitsubishi WD-62725 62" Rear Projection HDTV-Ready Television

1 Answer

My wd-73727 turns on, but nothing on the screen.

Power comes on, light stays green, but no pic or anything at all on screen. I have read several posts about light engine problems, but no one seems to describe what a light engine problem would look like. Does my problem sound like a light engine problem??

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  • 6 more comments 
  • Dennis Russell Apr 21, 2009

    I have the lamp out, and it looks fine. When I turn on the tv I hear it running. I just got disconnected with an "expert" that I paid 20.00 to chat with with no answers, how do I get him back, do you know if I will be charged?

  • Dennis Russell Apr 21, 2009

    no, I hear a click, and then possibly the fan, but doesn't start and stop.

  • Dennis Russell Apr 22, 2009

    Hey, I think you are on the right track. I put the bulb back in and now I am hearing the arcing sound three times and then nothing. I pulled it back out again, and put it back in and then got sound, but no pic.

  • Dennis Russell Apr 22, 2009

    Really, so am I understanding that the arcing sound is the Light Engine working?

  • Dennis Russell Apr 23, 2009

    Crikett, I would like to discuss this more with you if possible.



  • Dennis Russell Apr 23, 2009

    Thanks for your response. I am going to replace the lamp, but I think that I may still have a light engine problem after that. I received this tv from someone who did not want to deal with it, so either way it is a good deal. I know a great shop that will rebuild my light engine rather than replacing the whole assembly, so if I still have an issue after replacing the lamp, I may go that route. One thing I am curious about is that my service manual says that my replacement bulb is part number 915P027010, and the bulb that is in the set is 915P0270A10. I have looked at them both on the internet, and they look to be the same other than the A in the part number. Do you know what the difference is?

  • Dennis Russell Apr 23, 2009

    Ya,everything that I have researched says the same. The sticker that has the A is actuall on the housing, but the website below shows both part numbers on the lamps only, and all the specs seem to be the same. I tend to agree with you, sue the bulb that the manuals say, I just wonder if the guy I got this set from tried to replace the bulb, and put the wrong bulb in. Even your website says the 915P027010. Would that cause the bulb not to fire?

  • Dennis Russell Apr 24, 2009

    Thanks for all of your help. I found a lamp on e-bay for 89.00, but it is just the lamp, no housing. Will I be able to put the 915P027010 in the housing that I have even though it is the 915P0270A10? They appear to be the same size, wattage, etc. Do you think this will be a problem?



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Each case is different. With you behind the set I would like someone there to turn the set on and you will listen for what will sound like an arcing sound, usually about three tries, then nothing. That will tell you that the inverter is working to ignite the lamp but the lamp says no. In that case you need to take the 6x6 cover off and remove the lamp and look at it. Some shatter and that's an obvious sign of lamp failure. If you do not hear the inverter then we can suspect the color wheel which is part of the Light Engine. Only will you see a light engines failure is when a polarizer goes bad and discolors your picture. Other than that you can't tell other than trouble shooting. So let's try the lamp way first.

Posted on Apr 21, 2009

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  • Jim Krause Apr 21, 2009

    You will have to contact customer service for that. As far as the set goes I don't want you to be confused with the fan running, the sound I am referring to sounds totally different. Does it sound like it is starting then stopping and repeating that cycle?

  • Jim Krause Apr 22, 2009

    Replace the Lamp ! The arcing sound is the ballast trying to start a bad lamp. Let me know.....

  • Jim Krause Apr 23, 2009

    The lamp supply is doing it's thing to ignite the lamp, but if the lamp does not light, the lamp is bad. Like I said lamps won't always show physical signs of damage in order to be bad. I would suggest replacing the lamp. The light engine is the entire assembly after the lamp. The light passed trough a tunnel and a digital light processor receives the light, processes each color and away we go. The light engine usually cost about $800.00 for the entire assembly minus the lamp. One thing you must remember in the future, try not having any DLP set on during a storm when you think you might have a power outage. This can play HELL with the lamp because the fan cannot cool down the lamp like is normally done. It dramatically decreases it's life. That also goes for rolling black-outs in the summer.

    Let me know if this helps you.

  • Jim Krause Apr 23, 2009

    My parts supplier has your model with lamp # 915P027010-----only. I do not know where the A comes into play. If I had your set in my shop I would use the number above. If you would like to check it, go to

    Sometimes they sell just the lamp, and not the housing, but they don't show just the lamp, it comes complete in the housing.

  • Jim Krause Apr 24, 2009

    Yes it can. We've had them already.

  • Jim Krause Apr 24, 2009

    Everything should be OK. Please : When you get the lamp use a small amount of rubbing alcohol on the face of the lamp until dry then DO NOT touch the face again. The oil from your skin can cause the lamp to prematurely fail because of the high heat. God Bless and Good Luck !



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