Question about Mitsubishi WS-65813 65" Rear Projection HDTV

11 Answers

I may need a new DM board for a Mits WS 65813. Who has them on lie?

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  • Neptune36 Jan 25, 2009

    I started with the dreaded green blinking light. I followed the instructions on http://www.techlore.com/article/24711/Mi..., ....getting the service manual, replacing the caps, read lesson learned about putting in the DM PWB first then the shield and the results are that now no green light whatsoever blinking or not. Do I have a bad board? Is there another cause now for no power-up. The AC fuse in in the power supply is good so I have AC power to the unit.

  • Neptune36 Jan 25, 2009

    I did reverse the polarity of one cap after seeing a "+" next to one hole,(but the "+" was meant for a component next to the cap), installed the DM then saw no light, reread the instructions and noticed all caps are to be oriented in the same way. Changed the cap around installed the DM pwb still no light at all. I don't know if powering up with one cap reversed can blow something else. They are all correct now.

  • Neptune36 Jan 25, 2009

    I found a DM board on line however I need some confirmation that it will solve the problem. If it does not solve the problem and I have to buy another type of board I just spent more than a new 65" TV. Do you think the DM is the fix?

  • Neptune36 Jan 26, 2009

    I found a refurbished DM pwb online. But before I buy it I want to know if the "no light at all" situation would be solved by a new DM PWB or might something else be bad.
    Can anyone either 1) give me some way to check other systems to make sure they are not the problem or 2) can anyone say for sure the "no light at all" symptom is still definitely the DM board?
    Thanks

  • Neptune36 Jan 26, 2009

    One more time, Is there an expert that can verify if I replace the DM board, I am finished with the repair and the TV will work?
    Read my previous comments for an explanation.

  • Neptune36 Jan 26, 2009

    Ok, thanks for the last post. You used a new term, power board. Is this the power supply board? and is there a voltage measurement I can make to verify whether or not it is good?

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Sure if there is no power at all you also need to test the PSU board, you need to do a quick test on caps , and also read that the voltage to 5V circuit is fine.

If you have the service manual , there you find indicated the check points for the PSU board.

If you have complete service manual check also troubleshooting diagrams on DM board for no power/no raster situation.

Posted on Jan 26, 2009

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Sir,

standby voltage comes from the power supply and missing standby voltage will cause blinking green light with no turn on. So as you can see one would want to verify that stand by voltage is present before moving to the DM board. Standby voltage is found on pins 17, 18, 19 on connector KA-I believe but you'll need to check the schematic to be sure of the connector and the voltage readings should be 5-6 volts on 17-18 and 26 volts on 19.

If it is not worked, the problem is DM board. Because, Most of these sets just have the swollen caps in the DM supply. Some also have an open fuse on the DM supply. Others have different problems on the DM that go beyond these simple fixes.

Thanks
Good luck

Posted on Jan 26, 2009

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  • Master
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Hi and welcome to FixYa,

While it may be true that the DM board is faulty, may I suggest that you initially check first a few things:

  • the TV unit once plug on has a standby power supply with an output of +5VDC;
  • this +5VDC supplies among others the logic circuitry (controller);
  • additionally, it is responsible for the supply of the standby light;
  • absence of the light indicates that the standby +5 is missing;
  • therefore it is possible that the problem is in the power supply board;
  • it is also possible that the DM board is overloading the power supply. This could be determined by floating the +5 output connector of the PSU and measuring the voltages;
  • if +5 is measured with the output floated, then it would be the DM board;
  • if even with the output floated there is no +5, then it would be the power supply.
Good luck and thank you for using FixYa.

Posted on Jan 26, 2009

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Www.partstore.com or www.sears.com the parts dept!

Posted on Jan 26, 2009

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  • Master
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The DM board could very well be the problem, however there is a chance it is not the problem. You should NEVER spend alot of money on repairing a tv if you could have bought a new one for that amount. I also recommend buying the extended warranty on any expensive electronics. If you do wish to buy one, I have found a vast number of them on ebay.

Posted on Jan 25, 2009

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Hi Neptune36

http://www.partstore.com/Model/Mitsubishi/Mitsubishi/WS65813.aspx?ModelAliasNumber=ws+65813


The above link has your part, brand new or refurbished, depending on what you want to pay and what you prefer. Putting one cap backwards shouldn't have hurt anything, it will just make it appear as a negative capacitance and cancel out an adjoining one.

Thank you for using Fixya and good luck

bestdarngood

Posted on Jan 25, 2009

  • Benjamin Patri
    Benjamin Patri Jan 25, 2009

    Well, with what you are saying is wrong, I would also look into the power supply and make sure there isn't a problem with it after you have been messing around inside. Besides checking the fuse, you have checked for actual voltage past the power supply, correct? If not, do so and the DM board, I believe is returnable from Parts Store, but check with them first just to make sure.

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If the TV is within the warranty you can get it repair free of cost. If the cap or the power board might have gone bad I'm afraid you might need to call an expert or warranty Company.
  Good Luck! 

Posted on Jan 25, 2009

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Your required DM Board is available in Part Store.

Posted on Jan 25, 2009

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Go to a used tv shop and ask them to order the part for you. usually only takes a couple of days for them to get it in. all they need is the part number or the model of the tv itself and the part you need so they can order it.

Posted on Jan 25, 2009

  • Ronnie Houston Jan 26, 2009

    the dm board will definately take care of the no light problem. ive done a little research and i pulled the dm board from a bog screen i have and tried it no light i put it back and i have the light back and my set comes on

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Parts for that tv can be found here.

Thanks!

Posted on Jan 25, 2009

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  • 1 more comment 
  • taran_2005
    taran_2005 Jan 25, 2009

    IT seems the DM board wld be the only fix for this.


    Or if u wish , i can provide u with steps to check the board. however, to be on
    a safer side i wld advz u to give a call to serviceman.




    Thnx.

  • taran_2005
    taran_2005 Jan 26, 2009

    Yup, i wld personally suggest u rather than tryng to fix this and u might up lose time and
    money 




    ba bye.





  • taran_2005
    taran_2005 Jan 26, 2009

    Do not purchase board online,,,,




     Call customer care so that thry can fix it for u.....




       Cz its not easy to fix new board...






    Tke  cre.

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1 Answer

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The blogs on this subject are enormously helpful but you gotta be persistant to solve this TV problem because the fix may not be just the caps. I have a WS 65813, left the house for 3 months, came back to a blinking green light. Read Fixya and others and determined the fix is the caps on the DM board. Went to Radio Shack, got the caps, replaced them, plugged the TV in and now no light what so ever. In and out with the DM board 5 times before I called a local repair guy who told me to bring in the light box (chassis)..he said "I must have really done it.", meaning I'm way over my head and that's what I get for reading Fixya blogs and others. I swallowed my ego and decided to give him the light box chassis and $400 estimated. To take out the light box you have to remove the front panels. When I removed the glossy panel I noticed the cable connector to the power switch had separated, no doubt from the stress of sliding in and out the chassis to access the DM board (there is not much spare length in the cable feeding to the front panel). I reconnected it and voila! at least back to the blinking light..although still not fixed even with new caps. I read more blogs and saw there are three 4A SMT fuses on the underside of the DM PWB that someone suggested to look at. Got out the VOM, and there it was a bad fuse as open as the back side of my Mitsubishi. To see if it was the culprit and not having a replacement I soldered a small strand of wire across it, re installed the DM board now the 6th time and MADE SURE all connectors are back in place VOILA and it is fixed (temporarily) Super Bowl eve. I plan to get the right fuse and replace my temp fix. Lesson learned, you can mess things up trying to fix things so stay patient if you are a DIY're... you have to trial and error more since you are not the expert and are fixing things once. But it feels real nice saving $1,000. Now on to my charger on the boat.

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