Question about Mitsubishi WD-57733 57" HDTV

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Tv with no picture. i just bought a new bulb but still flashing lamp and no picture.I can hear it click on but thats all

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  • Mitsubishi Master
  • 6,993 Answers

Hello,

since you didn't get any picture, does the TV bring out sound? If the TV does not bring out sound, then it means the TV is having a power problem.

The clicking sound most of the time indicates a bulged capacitor on the power supply board of the TV. I think problem is with the power supply board and not the bulb.

But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress from www.shopjimmy.com.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Regards.

Posted on Sep 27, 2011

  • june Sep 27, 2011

    there is no sound either.. would the problem be solved if i just replaced the whole power board

  • Walesarumi
    Walesarumi Sep 27, 2011

    Yes because the fault is from the power board.

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Posted on Jan 02, 2017

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