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Samsung un55h6203afxza us01 tv. Sound,but no picture. p/s burned spot near connector which goes to backlights. Replaced all 4 boards-nothing has changed. I used a voltmeter set

To vdc to test the voltage at each M+ pin of the connector for the cable which goes to the backlights. Tested with the connector plugged in and also with the connector unplugged. In both cases I found 300 vdc+- on pin #1 and zero on all the other pins. I verified the volt meter is working properly, so that's not the issue. The flashlight test shows there is a picture, but no backlights working. Appreciate any advice as to what might be the problem?

Posted by Harold Wesler on


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SOURCE: Model CF1926A TV with insufficient

I think you missed one cap. Look for another 1ufd cap close to the jungle chip. It will have the circuit designation in the 300's like the others in the vertical circuit. It is just not located close by. I think that one will fix it.I don't have the service data with me so I can't give you the exact designation.

Posted on Jun 04, 2008



  • 4 Answers

SOURCE: Low voltage output from inverter

I am thinking this a high impediance device problem and this is normal operation - the user manual of my inverter warns about use with high impediance devices - if not I am interested also...

Posted on Mar 03, 2009



  • 29 Answers

SOURCE: I have a RCA L32WD12 that my dad got for free 2

no negative have to mesure from positive lead to negative about 24 v.

Posted on Jan 20, 2010


  • 1 Answer

SOURCE: I have replaced the power supply on my Acer Aspire

When you have this problem on this PC, do not replace the power supply or the motherboard until you have first tried pulling out the video card. When the video card fails it can cause the x1700 to not power up. Pull the video card and see if it will power up without it.

Posted on May 19, 2010


TV Doctor

  • 373 Answers

SOURCE: I have a Westinghouse LCD television with built-in

I am a TV repairman and I have repaired TV's almost everyday for the last 30 years. And I know from experience that if an electrolytic is warm on the top of them that they are starting to go bad. My suggestion is this: Take the one's that are warm out and if you have a capacitor checker, check them to see if they are weak in capacitance. If you don't have a checker the best way is to replace them. It will be worth the effort to find out. I very often, take capacitors out of a spare board (not the same) and use them. I am assuming you are referring to the power supply as the main board. The capacitors that are in line with the voltage to the inverter is 24 volts and they sustain the voltage and keep it up under a load to light up the backlight. You could look and see that some boards put the voltage by the pins on the connectors and this may help if it does in this case. However, the inverter has switching circuits to produce the high voltage to the transformers on the inverter to light up the backlight and if they don't turn on then no backlight. Inverters are highly intergrated so replacement is best. Also there are fuses on the inverter labeled F1, F2 etc. Check them for continunity. It the fuses are open then you for sure have a bad inverter board.

Posted on May 26, 2011

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Hi Peter,
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