Question about Samsung SP-R4232 42 in. Plasma HDTV

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SSP-R4232 Plasma TV, blue light on, but tv wont turn on.

I have a samsung SP-R4232 Plasma TV, the blue light around the power button lights up, but the tv will not turn on when I push the power buton. Nothing seems to happen at all. The remote will not turn the tv on either. I have looked at the power supply, not finding any bad capacitors, any other suggestions?

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  • 3 more comments 
  • Ryan Knaub
    Ryan Knaub Nov 19, 2009

    Just out of curiosity, can I ask what makes you think Main board rather than power supply board? I do have +5v going to the mainboard from what I can tell, I have done some poking around with a VOM and figured out all my fuses look good. For $88 I can get the new mainboard, thinking it is worth it, since this TV was given to me for free... but I can also buy the power supply board for less than $100... I am willing to buy both but of course, the cheapest way, the better way. Thank you very much for your extremely helpful suggestions! Much appreciated!

  • Ryan Knaub
    Ryan Knaub Nov 19, 2009

    When you plug the set into power, the blue light comes on, and stays on. When you press the actual power button, nothing happens... the blue light stays solid, you do not hear the typical Samsung chimes either.

  • Ryan Knaub
    Ryan Knaub Nov 19, 2009

    I must also add that I have checked the switch under the button, and the switch is functioning from what I can tell. I did a continuity test between two of the leads on the little button, and it worked when I pressed the button.

  • Ryan Knaub
    Ryan Knaub Nov 19, 2009

    I must also add that I have checked the switch under the button, and the switch is functioning from what I can tell. I did a continuity test between two of the leads on the little button, and it worked when I pressed the button.

  • Ryan Knaub
    Ryan Knaub Nov 25, 2009

    I got my main board today, found it for $80 on eBay. TV works perfectly now, thank you so much! THANK YOU THANK YOU THANK YOU!

    Your advice here with this problem has been extremely helpful, and you were so quick to respond. Again, thank you.

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  • 1,284 Answers

At this point it appears that your main board is probably bad. You most likely have a 5 volt scource going to the main board but its not powering up the set. The main board is part number BN94-00796A.
You might want to have a technician look at the TV to verify this as the issue before purchasing it. Please take a few moments to rate my answer. Thank you.

Posted on Nov 18, 2009

Testimonial: "I was extremely grateful to have a response in such a short amount of time, as soon as I replace the part that was suggested as bad to me, Ill post."

  • 1 more comment 
  • Don
    Don Nov 19, 2009

    Ok, when you press the power button the blue light comes on or does it flash or run solid? The other question is do you hear a start up chime that Samsung's typically do?

  • Don
    Don Nov 19, 2009

    With all that said I do suspect the main board since nothing happens when you press the power button.

  • Don
    Don Nov 25, 2009

    I am glad it worked and you got a great deal on the board... : )

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My Samsung SP-R4232 has some type of power supply issue. I called a tech who came out and verified it. He thought it was the main power board, but wanted $400 to fix it when I found the part online for...


U replaced the tv power supply board,the board u replaced,that is the board where the power a/c cord plug into it?Check ur old power supply board,examines all parts,see if u have any capactors parts are bulging or puffing up on it tops.Yes,than it is power supply board issue.But by replacing the power supply board only get 50/50 chances for the tv to work.Might be the problems,might not be the power supply board issue alone some times.The chances are tv Tuner signal board is dead also.That the board,where the tv incomming broadcasting signal cable plug into it.Try website like Ebay.com to buy a refurbish tv Tuner signal board for the replacement.

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1 Answer

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Most likely the TV has a power supply related problem. It's possible that it maybe a bad capacitor or transformer on the power supply board. Or, something simple like a blown fuse inside the TV. The most common board to go bad is the Backlight Inverter Board. It what supplies power to the screen. But, I can't say it's 100% the problem because I can't actually look at the tv over the internet. I can only make guesses with the symptoms.

You have a few choices:

1. You can try leaving the TV unplugged for 30 - 45 minutes so the TV can discharge and reset itself.
2. If by chance the TV is still under warranty, go that route.

3. If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists.Usually, cost under $20. And most cases the new part cost less than $15.

4. Pay a TV shop to do the repairs. It maybe costly, but get an estimate of how much they will charge. That way you can decide if it worth repairing or replacing the whole TV.


I hope I shed some light on the subject for you.

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Call tech support! That's why these people get paid. Sites like this wouldn't need to exist if they did their jobs correctly!

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