Question about Samsung HCN4226W 42" Rear Projection HDTV-Ready Television

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Picture will not come on

When you push the on button for the tv, the button will light up red but no picture will show up. There is also no sound.

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- HiTech I am having the same issue, are you sure about your solution?? Because if I unplug the Covgence IC board, the TV power up with a miss-aligned screen. So I am assumming is the the IC board (STK392-040 with other burn out resistor) I am about to fix that, so I just wanted to know are you sure your soultion will work? - Judy, can you confirm did you get this working by fixing that

Posted on Nov 09, 2006

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Sounds like you Switching IC has failed. This is becoming a common problem with this type of TV's. This IC is identified on the board as IC831S (STR-X6456). The chip cost about $24.

Posted on Nov 09, 2006

  • Charles Husak Nov 10, 2006

    This was a possible solution, but if you say it powers up when you
    remove the Covergence Module this could be a possible problem. The
    Samsung's are equipped with a Fail Safe circuit, if the F/S changes from its 2.5 volts the MICOM kills power to T801S. To test
    this check the power on CN801. They sould read as follows:
    with your meter attached to TP61 to grd should read 117 volts and
    13.8 volt at TP62. If these are not present then T801S is turn-off. If they are present then you will need a Oscope to do futher
    testing or just replace the Covergence and see what happens.

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