Question about Philips Magnavox 27MT5405 TV

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Horizontal lines after power on, then shutdown

Model 27MT5005D shutsdown after power on. Replaced cap 2465 10uf 100v capacitor to fix horizontal lines, but still did not fix problem

TV is about 2 years old and still has horizontal lines going across it. What part would you try to replace next.

Looked up parts lists and all i can find is in Chinesse*

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  • davexbox360 Aug 12, 2008

    Terryfic, i am sorry i wasted your time i just trashed it last night cause i fixed a better one i had setting around.



    Thanks for your time

  • Vista Electronics May 11, 2010

    Verify Model & Chassis # from back of set...



    Terry.

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  • Master
  • 1,694 Answers

No Worries...try me again sometime....T.

Posted on Aug 12, 2008

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Your tv set may have a short circuit both in the power supply and horizontal output stage. The first approach I suggest is to check the rectifier fast diode in the line supply (90/100V) for short. This model is prone to burn this component and may be associated with some problem in the horizontal output or even in the RGB output.
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if my info/idea helps you, please kindly rate my solution.

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Since you changed the flyback did anything change? If not, you may want to take a close look at the horizontal peaking caps or the horizontal electroltic capacitor. I hope this helps.
If I can help any more, email me at wyoed1@aol.com
"Original Radio Man"
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1 Answer

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I agree with solution #2

I recently had my phillips 27" model 27PT6341/07 repaired after warranty expired due to white lines appearing at the top of the screen. The shop advised that it was a capacitor giving me the problem. So, after getting it back, I examined the repair job and the shop had replaced a capacitor at the back of the main board, next to the rear rca inputs. It is labeled 10uf 100v. I was told that it would fail again soon because it is a manufactures defect. For me it is at location 2465. Here are a couple of photos of the part.
http://farm4.static.flickr.com/3215/2337629026_eaa30cfa18.jpg?v=0

http://farm3.static.flickr.com/2411/2337627420_b45bbf1a74.jpg?v=0

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1 Answer

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You might have a cap that shorts after it heats up causing your problem. The whinning sound you hear sounds like the power supply has a short on it. Usually when this happens though, it doesn't go away until some part such as the horizontal output transistor is replaced. RCA's are notorious for flybacks shorting and then shorting the horizontal output transistor. Your flyback may be shorting intermittently. Strange! Stargazer

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