Question about Samsung SPP4231 42 in. EDTV-Ready Plasma Television

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After 2 hours viewing right side of picture gets wavy . I have already changed 3 capacitors on the power supply board.

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TV is getting too hot. Blow air with a fan up through the TV and this will cool it down and the picture will return to normal. Let m,e know if you can find a fan unit that will fit on the TV without too much noise as I could use one too.:o)

Posted on Dec 16, 2009

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The problem is not on the power supply. It is either on the P-Logic bd or Main bd.

Posted on Jul 17, 2009


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1 Answer

Replaced 3 capacitors for start up issue, now have radom with vertical lines

You will need to replace all the capacitors in the output side of the power supply. It is possible you have other bad capacitors that are not bulging at the tops. The power supply generates a voltage used by the the video processor on the main board. If this voltage is out of whack, it can affect your video. I would recommend you check all power supply voltages for accuracy and ripple.

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Mitsubishi WS model 55613


This is a picture of the DM Board in your TV. The wavy lines are tell tale signs of a failed capacitor. The capacitors are the cylindrical components on the board. One or more of them have failed. There is also a FMT Board with capacitors that could be causing this also so test them all. The DM board alone is 1000 bucks so it would be well worth it to invest in 50 bucks worth of capacitors and change them all out. Your boards would be fresh and good for another 4 years.
Your other option is to call a TV repair man and he would come pick up your boards and bring them back to his shop and test out the bad 3 dollar capacitor and swap it out and hand you a bill for 500 bucks.
Hope this helps you out.

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1 Answer

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Flickering or wavy picture is a very common symptom of failing capacitors in the power supply board. This is a very easy repair, it just requires replacing the 6 capacitors on the power supply board. Here is a link to a repair guide for the SyncMaster 214T which uses the same NP-20 power supply board so the repair information will be the same.

I hope this helps,

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LG L196WTQ monitor just quit working. won't turn

Look in the power supply section first for bad caps, post back what you find inside, pictures will help a lot to guide you through, see example of failed monitors due to bad caps:

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3 Answers

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The problem can be in the bcaklight inverter board or the main power supply is not supplying the power to the inverter board. The main power supply gets the turn on signal from the control/main board.

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yes they provide a free service manual with their kits. the symptom of the blue screen could either be the signal or the FMT as they can both cause those symptoms, My professional guess would be the signal board as the FMT will cause distortion lines across the screen with no picture.

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1 Answer

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you are probably having 2 problems. on that model there was a jumper wire the fed the convergence amps power and would get very bad cracked solder. and casue some fuses to open on the main deflection board. if that is there i would recomend replacing the 2 convergence amps(stk392-110) and open fuses. but your wavy lines are going to be all the 10mf16v surface mount capacitors inside the hyperunit(figital scan card) it is a square metal case located behind the input board.*****it is soldering in with 4 tabs on the bottom side of the signal board so be careful not to just start pulling on it to get it out*****

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1 Answer

Wavy picture

You have problems with your power supply filters. I'd suggest you to change the mainfilter, that is the capacitor just after the ac rectifier and the b+ filter, that is the capacitor at the output of the smps, and then vertical filter and video filter. These are all capacitors with higher microfarad ratings, if you are not much comfortable, it's better to get some help from someone who is familiar with these. Pay attention not to reverse the polarity when changing the capacitors.

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1 Answer

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you got somes capacitor bothering you, and nop, there are nothing you can do, but call a tech, the problem could be in the video card or in the power supply but is a tech job....good luck

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