Question about Samsung 43 PN43D450A2D Plasma TV

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Samsung Plasma tv pn43d450 tv wont turn on

TV is Samsung PN43D450A2D and it turned off the other day and now wont turn on checked the power board no bad cap. and looking to see if anyone out there had any thoughts.

Posted by Brian Rezac on

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1 Answer

SD Tech

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  • Samsung Master
  • 14,553 Answers

If caps there not puffed or leaking voltages in and out of the power board must be checked next (right at turn on of the set) to see which come up and or instantly go off....this is the place to begin.

Posted on Mar 27, 2012

Testimonial: "Quick response thanks What could it be if its not the power board? The logic boards wouldnt do that would they "

  • 1 more comment 
  • SD Tech
    SD Tech Mar 29, 2012

    The main or the board with the micro on it could or any board holding a voltage in the power supply down---even seen some where it ended up being the panel..............

  • macovei liviu Jun 19, 2012

    I am in the same situation with the exact model pn43d450 tv.
    I looked on the internet and i tried to do my best.
    1: change the source board-nothing happened
    2:change the logic board -nothing happened
    So now i think this TV belongs to the dumpster now along with that annoying clicking sound and Samsung will have one client less.(tv was 3 months old but because i was using it in the Bahamas ..no service:))

  • Brian Rezac Oct 29, 2013

    I did the same even replaced all the boards still doesn't come on so yeah not gonna buy a samsung ever again mine went out after 6 months I bought a new vizio and parted out the samsung

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5 Related Answers

moorah1

Alexander Moore

  • 181 Answers

SOURCE: My samsung 32'' lcd tv

poke it open, you'll find bloated capacitors at power supply board. biggest one, with power cord pluged into. replace with thesame value(s).
you good to go!
don't lie, next time! your set has been acting up fpr a while, before it quit. Remembering: few attempts to turn it on, then it works!
good luck.

Posted on Apr 05, 2010

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Jaime Hernandez

  • 2337 Answers

SOURCE: Samsung Power Supply Board

The power supply part number is BN44-00159A. You can also download the info from this link. It's the service manual.

Posted on Jul 17, 2009

Cary Leonardt

  • 304 Answers

SOURCE: Samsung TV Power Supply Board

I doubt that moisture damaged the SMPS bd.
There are many circuit boards in your set and it will take a trained samsung tech to find the problem.

Posted on Jul 17, 2009

tvtek

Duke

  • 1284 Answers

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

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."

toddthetvmd

Todd Thornton

  • 101 Answers

SOURCE: my samsung plasma tv went out and it just makes a

It was not your power board, Thought the same on several repairs.Found out it was the main board. The clicking was the tuner relay. I bet you own a SP-R4232. If so,The part you need is BN41-00574A. Also might be under BN94-00669A. Hard to find. Try Shop Jimmy/Or Encompass Parts. Not cheep tho. Hope this info helps.
Have a happy new year. Todd

Posted on Jan 01, 2010

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1 Answer

Replaced the power supply board on my plasma tv. Now have a snowy picture on all inputs. Green light on the logic board blinks evenly. No puffy caps. Is there another board that needs to be replaced?


After the power supply board replacement, Va & Vs voltage adjustment is a must and necessary for the proper working of the plasma display panel. Do it. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/

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My tv (Samsung UN46FH6030) starts turning off and on repeatedly after about 2 min and won't stop unless I unplug it.


The main board has circuits that operate the power relay . Look for bad caps in that board too.

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Try changing the input device to something you are sure works. Switch off TV manually, switch off power, remove plug and retry after 48 hours. If problem persists, please refer it to a qualified service technician.

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I have a samsung ln-t4053h that had a bad caps. I replaced the caps and the tv turned on fine and i put a flashlight to the screen and the screen turns on but the backlight is on 10 and it looks like its...


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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look for bad capacitors on power board bad caps will have swollen tops instead of flat tops replace with same value try to get high temp caps as they go bad from heat

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Same problem with mine


Based on what you have described, you have lost the power supply or main board. Unplug unit, carefully lay it of the front side, pull about 10-20 screws out of the back, look at the electronic boards, if you know what caps are, run your finger across the top of the caps,if they are swelled up, then that board is bad. Those boards go for 150.00 to 500.00 each.

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