20 Most Recent Samsung PN50A450 50 in. Plasma HDTV Questions & Answers

I have a Samsung Plasma PN50A450 and one night the TV turned off and the result of trying to turn it back on was simply the set trying to turn on, making a click sound and nothing happened. I pulled the back off, and attempted the capacitor fix that is well documented on the Samsung LCD TVs. I did have a swelled capacitor that I replaced and also replaced the other capacitors that were the same Microfarad rating, temp and voltage which were replaced in a popular UTube video. That did not solve my problem, so I went onto Ebay and bought an entirely new power board for 69.00 plus 14.99 shipping. Replacing the board took about 3 minutes. TV is now working fine and will go back up on the wall in a day or 2. Note, the power board in my TV was a BN44-00205A. That board is no longer in stock anywhere ( I believe because it has been determined to be a bad board) I replaced it with BN44-00207A. Which I suspect is the board that is being used for replacements of the bad BN44-00205A. It fixed My TV. Hope this helps you. BTW, Both power boards are listed for replacing a board in the PN50A450, but the BN44-00207A Specifically states its for a PN50A450P1D. I took a gamble that the BN4400207A would work. It did.

Samsung PN50A450... | Answered on Oct 30, 2019

Please find the link below to be useful for your request to get support from Samsung as the service manual is not available freely.check this link:

Samsung PN50A450... | Answered on Sep 26, 2019

Check to see in dark is there is light at all coming from the back light lights or LEDs. If no light is coming it means either the power does not come to the lights or they are bad and need to be replaced in case of a backlit fluorescent system. Check the power board for voltages, then check each board for voltage on it. Look for plugs and connectors, there you will see voltages that are coming to feed them. Start one by one.

Samsung PN50A450... | Answered on Oct 23, 2016

Most obvious area is the power supply.

Samsung PN50A450... | Answered on Sep 27, 2016

backlight inverter or tcon board

Samsung PN50A450... | Answered on Sep 27, 2016

If you wish to get some details; check the site linked here. Pull up older posts.
Line faults & possible causes to both Plasma & LCD screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD screen are similar, irrespective of its brand and screen size.

Samsung PN50A450... | Answered on Mar 27, 2016

hi this sound like a capacitor could have blown or bulged up could you put up a picture of the power board i'll take a look for you


Samsung PN50A450... | Answered on Jan 25, 2014

Many sets use a mechanical relay which may be what you heard.

Based on what you have told me here with your question I agree first place to look is power supply.

All sets have as part of the power supply a standby supply that runs all the time when set is plugged in---it supplies the voltages for the remote or manual on and off to power the main supply and with it the set to be turned on.

You are able to safely get the back off---lay set face down so entire screen is supported evenly---no downward pressure as the screen unit can be instantly destroyed.

Most sets have to be taken apart this way if a base is attached as it will have to come off to get all the cover screws off.

You may be on the right track with filter caps---that standby runs them all the time and the material in cheap caps can dry out in less than two years--using cheap ones cuts cost when making the set.

I will attach a few photos of what to look for---one is a mild example and another has some extreme examples---if locate one or more I can explain how to replace and identify their values--not hard as each have only two leads soldered in--values are actually marked on the parts--each has a plus on one side and a minus on the other.

let me know if you find bad ones.

look for perfectly flat tops like on left===right one is just slightly puffed up and is still bad.


The ones with arrows are extreme examples and some of the others look ok.

Samsung PN50A450... | Answered on Jun 14, 2012

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