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Power Supply Circuit Board Repair

I have taken apart my Samsung TV UA32H4303 and found that there's a burnt mark on the power supply circuit board BN44-00767A. I'm wondering if i can still fix it? Not too sure how to upload a picture here, but here are two google drive links to see the damage.

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If it can still be DIY repaired, what should I do?

And if I have to replace the whole circuit board, where can i get it? Seems like it's a old model and is no longer in supply. Or if I can replace it using another circuit board with a different number?

Update (07/02/2018)

Hi @oldturkey03,

Thank you for your speedy reply. Glad to hear that there is still a chance to repair this.

You've asked for the underside of the board, is there anything else I should take note of?

The google drive link to the picture:

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You will be able to see the 4 arrows that corresponds to the bridge rectifier. The dirty portion beside one of the arrow corresponds with the burnt mark on the other side of the board.

Many thanks in advance!

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check on the cold side of the board for other components that do not quite look right Since it is the + connection on the rectifier it is possible that you have a short circuit on that side of the board. I am trying to find a schematic of the board to see if we can find out what may have caused this.


Hi @oldturkey03,

Finally had some time to replace the rectifier, but alas it didn't work. Seems like the same problem, sparks flew when it's powered on, increasing the burnt mark on the circuit board.

Any other possible reasons to this?


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the component that failed is a bridge rectifier. You could try and replace it and see what happens (always buy 2 just in case it blows up as well) The part should have an identifier on the case. Post some pictures of the underside of the board as well. There is a reason why the rectifier has failed. The power supply is still available at places like and others.

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Ken will be eternally grateful.
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