Question about Mitsubishi WS-55511 55" Rear Projection Television

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When my tv powers on, it powers off right away. what causes that

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Very probable this is a convergance failure, when the ICs go bad it shorts a fusable resistor to shut down the TV. Very repairable, would recommend having a TV repair facility take care of it, should be able to get it done in your home! Find us, very competitive pricing!!

Posted on Sep 30, 2010

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Posted on Jan 02, 2017

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I turn the Tv on...it makes a sound like a short and shuts off right away...I pulled the Tv out and looked at the back...turned the tv on again and in the left corner of the TV I saw sparks and the TV shut...


Hi,

the issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.......

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.......

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.

Yours sincerely.

Elect_Comp.

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2 Answers

I turn my vizio on then it just turns itself off


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1 Answer

I am on Direct TV. That part works fine. The tv however takes several minutes for display to come on.


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this sounds like an IC thats Bad


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1 Answer

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