Question about AOC LM729 17" LCD Monitor

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CRT in CNC machine

Screen is completey dark

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  • hammy1972 Jun 25, 2008

    it will turn on for 20 secs then the screen goes dark



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Screen goes black

Posted on Jun 25, 2008

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Could be a multitude of problems. first, check that the cathode heater is glowing. then check that the getters are still silver (indicates vacuum leak) then test for anode voltage (high voltage probe required). if all of the previous tests pass, you should at least have a dot on screen. if not, then signal is not getting to tube (cathode). test cathode connector (disconnect with power off) with o-scope.

Posted on Sep 17, 2007

  • 2 more comments 
  • Marty marty Sep 27, 2007

    any progress on this solution?

  • Marty marty Sep 27, 2007

    any progress on this solution?

  • Marty marty Sep 27, 2007

    any progress on this solution?

  • Marty marty Oct 06, 2007

    hello any progress on this solution? still need help?



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