Question about Mitsubishi WS-55513 55" Rear Projection HDTV

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When using over the air antenna, picture is unstable. When using any of the RCA jacks, no signal is received. Is there somthing specific that can cause this?

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On the signal board there is 4 surface mount transistors. There is one right by the input board (BA09), i would check the corresponding caps and diodes close to it also. I would replace all of the 4 transistors. If this SMT starts to go you will see wavy lines in your picture than it will go away in 3 min or so and get worse over time until no picture is seen. When it totally fails you will have no inputs what soever but you will have an OSD screen and when you choose DTV you will get a scrolling picture.

Posted on Nov 25, 2009

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