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My Protron PLTV-26 will power on(light goes from red to green) and I see the screen briefly, then it goes into standby (light turns yellow) and stays.

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  • jg_grintech Sep 29, 2010

    I am a former Electrical Engineer and studied TV repair once upon a time. I have a scope, multi-meter, and soldering gun. Can you point me in the right direction?

  • jg_grintech Sep 29, 2010

    Ok, will do and will keep you posted.



    Thanks!

  • jg_grintech Sep 29, 2010

    Ok will do

  • jg_grintech Sep 30, 2010

    So what you are saying is that the power supply is "crow-barring"?

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Http://nettopdf.info/download/pdf/Service%20Manual/aHR0cDovL3d3dy5tYW5hZ2VteWxpZmUuY29tL21taC9saXNfcGRmL09XTk0vTDA2MDQ4OTEucGRm
www.managemylife.com/mmh/lis_pdf/OWNM/L0604891.pdf
Above are your service manuals.
This is a fairly classic switchmode power supply, I see this type of fault very frequently in my shop. The special fault detection circuitry in the PS, is shutting the set down to avoid a fire, explosion, or both. This set had developed a problem, that is so severe that the set must be shut down, This set should be removed from the Power. In my professional recommendation, you should get a "Quote" for repair, from, a, Proton Approved Service Center, this point is very important for a good result, Always contact, their local, "Head Office" Now, when you get the information you want, then you can decide as to repair of replacement. The reason we want an approved agent, is that way, all the engineers are trained on their own brand sets, they have seen almost all faults, and will get the job done quicker, and for less cost, and usually have parts on hand, also sometimes, there has been a service bulletin in issued and the repair may be subsided or even free.
There are many, many types of "Faults" that can cause this, so the issue must be troubleshot.
Below is the link for Proton.
www.protonav.com/

Posted on Sep 29, 2010

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Remove back and look on Power supply board for Bad Capacitors they will be vented,swollen,or puffed up on TOP.
2200uf 10v 3300uf 10v

Posted on Sep 29, 2010

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This is definitely an indication of major hardware failure inside the TV, most likely the power board, but it is hard to say with certainty. Unfortunately this is a very difficult repair, and unless you are an electrician I would not recommend attempting it. You will need to contact a local TV repair person in your area. If you think it may still be under warranty please contact the manufacturer to file an RMA. If you happened to purchase the TV with a major credit card (not a debit card) there is a good chance it may still be under the free extended warranty most credit cards place on electronics. Please contact your credit card company to inquire if they do this, and they will be able to file the claim and get you a refund for the TV.

So sorry that I don't have better news but it is definitely a power issue internally.

Thanks
Tim

Posted on Sep 29, 2010

  • Tim Grayson
    Tim Grayson Sep 29, 2010

    Alright the first place to start would be to open up the TV and check all boards, especially the power supply board which you should be able to easily locate, it's where the power first flows to. Look for bulging capacitors or any other obvious issues like that. From there follow the flow of power and check for obvious damage like capacitors... those are the most common things to go, see if a cap somewhere is bulged or blown.

    Let me know!
    Tim

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http://www.shopjimmy.com/catalogsearch/result/?q=Protron+PLTV-26

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