Question about Samsung HCL4715W 47" Rear Projection Television

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Samsung HC-P4752W No power

Hello,
The LED comes on and blinks three times. No power, but I can hear the high voltage flyback at startup. I suspect one of the low-voltage supplies. This set has a half dozen low-voltage regulators. I guess I'll have to purchase the service manual. Anyone have a solution?
Thanks,
-Dan

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  • Dan Smith
    Dan Smith Jul 04, 2008

    Thanks for the advice:

    Yes, I have disconnected the covergence yokes. When I do, one of the tube filaments lights up for a few seconds, then goes out and still no power.

    Thanks again!



  • wd401979 Jul 18, 2008

    no power timer led light comes on blinks three times and shuts off you can hear something in back come on

  • Dan Smith
    Dan Smith Oct 11, 2008

    Turns out one covergence IC was blown. Two pairs of 3.9 fusible resistors were open. Replaced both IC's and resistors. Unfortunately, the set suffered a bit of phosphor burn, two 3" lines at the top of the screen. I unplugged all connectors going to the yokes which may have caused the burn. Thanks very much for the help!

    -dan

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  • Samsung Master
  • 8,617 Answers

Have you tried unplugging the convergence yokes and then try powering up the set? Its not uncommon for that chassis to shut the set down when the ICs are bad.

Posted on Jul 04, 2008

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http://electro-medical.blogspot.com/
http://homenol.blogspot.com/
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Apr 27, 2009 | Samsung HC-P4752W 47" Rear Projection...

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