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We have a Sharp LCD TV that is less than two years old. Last night, while watching, the picture went out and the power button kept flashing. I checked other posts on this site and tried resetting it by pressing the volume up and channel down button while plugging it in. Then it was supposed to go to a service mode menu. The unit powered on and the power button stopped flashing. The sound is working but not the picture. So I tried some of the other advise posted and held down the power button unplugging the set for 10 seconds and then plugging it in for 10 seconds while still holding the power button. It powered on with sound and picture, then went off and the power button is flashing again. Any ideas of what to do to get the picture and sound both working again?

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  • 1222brian Jun 02, 2010

    I was hoping not to take it apart. Any resetting ideas that might work?

  • 1222brian Jun 02, 2010

    I do not have a lot of technical knowledge, but some people have been able to just reset it. Is this not an option for me? Does it need to be taken in for repair?

  • Shahid Electronics
    Shahid Electronics Jun 04, 2010

    TV symptoms was going to change in every update to better to take it in.

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  • Master
  • 8,619 Answers

Hi


Thanks for using FixYa. Blinking light means that the power is getting to the unit however, as its not working which means that the power board should be checked. To start with open the back of the unit and then check the power supply board for any bad (bulged/swollen) capacitors. Power supply board is the board where all the power cords/plugs goes into. After you have checked that also check the main board and if you can use a multimeter to test the components on these boards. However, from your earlier posts it seems to be the main board that is bad and should be replaced. All this should only be done if you have knowledge of internal circuitry of the unit as the components consists high voltages even when in off position. Please do accept the solution if the issue is resolved or post a comment for further assistance.



Thanks
Rylee

Posted on Jun 02, 2010

  • Rylee Smith
    Rylee Smith Jun 02, 2010

    You have already tried the reset thing earlier and it still did not work so it'll be good if you get it checked by a professional else if you want to DIY then you can open the unit and check the power board and/or main board. Please do accept the solution if the issue is resolved or post a comment for further assistance.


    Thanks
    Rylee

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  • Master
  • 5,138 Answers

Have you removed the back and Looked for Bad capacitors they will be swollen,vented or puffed up on Top? Let me know what you find.
220uf 10v, 3300uf 330uf 10v and 1000uf 16v. I also need the model number printed on back. Thank You and Have a nice Day

Posted on Jun 02, 2010

  • ladywinn
    ladywinn Jun 02, 2010

    You need to have TV repaired.

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Hi


Thanks for using FixYa. As you have already tried the reset procedure so to check what has gone bad you’ll have to open the back of the unit and check the backlight inverter board. The inverter is the power supply source for the backlights. If that’s the issue then it’s always better to replace the inverter board completely just to avoid any future issues. If not then check the power supply board however, it seems to be the inverter board as the sound is still working fine.Please do accept the solution if the issue is resolved or post a comment for further assistance.


Thanks
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