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I have a samsung dlp (HLR5067WAX/XAA). I turn the unit on, the bulb lights, the green lamp blinks for 20 seconds or so (like normal), then the lamp light goes off (like normal). The set stays on for about 60 seconds, the picture is completely black. From my research it appears I need to replace the digital board (bp94-02084a) or the DMP board (BP96-0220A). Is it possible to determine which component is at fault. ie hook a computer up to the DVI input on the DMP board?

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  • dan4540 Jul 26, 2009

    Please read the question again. The last
    sentence is asking how can I determine which board is



    causing the problem?

  • dan4540 Jul 26, 2009

    Is the DVI connection on the DMP really a DVI connection? I could connect a computer to that connection and see if it displays a picture, thus rulling out the DMP board.

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I realize this is not what you are wanting to hear but there is no easy way to test these boards. I wish it was as easy as telling you which part failed . TV repair shops have a lot of money invested in electronic test equipment. If there was a way to tell without diagnosing the TV they could save lots of money by not purchasing this test equipment. Heat is the enemy of electronics, and these sets operate hot. These sets are assembled using the wave soldering process they are known for having cold solder connections. This model of TV has over 3,000 parts which include millions of transistors inside the integrated circuits. The capacitors will change value, leak and become defective which most likely is a problem on yours, see if you find any with swelling tops as that is an indication of being bad. Resistors will change value and burn and sometimes look burnt so any with infinite resistance should be replaced. Integrated circuits and transistors can go bad. This can cause other components to become defective, which can have a domino effect and cause other parts to fail.

Replacing one defective part may make the TV operate for a short time but the part will fail again since if the parts that caused the failure to begin with are not replaced. The only way to know for sure what is causing the problem, which parts that are no longer within factory specs and for proper repair all the electronics must be diagnosed by someone with the correct electronic test equipment and the skills to use the test equipment. I wish I could tell you there was a quick fix or button to push that would fix the TV but that is not the case or the solution needed to get the TV operating correctly.
A good start would be to have a multimeter which measures (voltage, current, and resistance), you can buy these at Radio Shack. If you owned and know knew to operate an oscilloscope that would help too. At least you have two boards to start on and start seeing if any parts aren't giving a good reading, though you would probably be better off trying to replace a board even though it will cost more, maybe a shop would let you try a board and return it if it doesn't work though usually they won't but its worth a try. Let me know how this turns out.


Benjamin

Posted on Jul 26, 2009

  • Benjamin Patri
    Benjamin Patri Jul 26, 2009

    Well yes, I guess you could do that then and see if you get an image. Usually we track down components that are failing or try swapping boards right away to see if one will work.

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Hi,
In this DLP TV, Digital and DMD boards are not suppose to be repaired at component level nor spare parts and schematics are available in related service manual for subject boards. So only solution is to replace defective board.
Click Part Store to get price info as both boards are available there.
Thanks.

Posted on Jul 26, 2009

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