Question about Olevia LT27HVX 27 in. LCD Television

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Syntax/olevia lt26hvx constant power cycling. The unit will turn itself on and off without input from the user, and no intervention by the user will stop the cycling...only pulling the power cord will. I have replaced the circuit board that the power button is located on, but this did not solve the issue.

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  • jp_pphillips May 24, 2011

    Understood,



    However, can you explain why the tv WILL remain powered on when I disconnect the ic board that holds the power button? I can disconnect this board during the power cycle, and with careful timing the tv will stay on and functional.



    Thank You




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  • Olevia Master
  • 73,619 Answers

Hello
The fault is not related to any button or remote control problem. There is some short inside the secondary voltage section of the power supply section inside your Olevia. Normally, if the inverter board, that generates high voltage of the CCFL lamps used inside, to generate backlight will get winding short inside it in between. If so, when set's power supply sections [SMPS] tries to start up, and if it will get any sign of short, the main system control IC will send a stop signal to stop the power switching section. After that, when it has been done, the power supply section again tries to start, detects short, and shut down again. This process is going on now with your Tv. The high voltage inverter section is very dangerous to one who doesn't have any knoledge in electronics. If there is an opwn circuit inside the inverter, it will arc to the surroundings.
In fact, your set's trouble is not a user repairable one. If you have enough knoledge in electronics, and have all the measuring equipments, just start from this section. LCD power supply, all types and all company's are very sensitive to any short circuit, and you must be well experienced to detect the short. If you are able to do, have confidence and more patience, proceed. Otherwise get help from any experience service technician you trust. OK.

Posted on May 23, 2011

  • The Knight
    The Knight May 24, 2011

    The board contain the digital IC that detects short circuit, a logic IC, working as ome part of main system IC. When you disconnect the board, there will be no stop signal send to the power supply board as short indicatin. Doing this will surely damage other components, and the fault will turn more complicated.

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