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Intermittent color test pattern issue.

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    Intermittent color test pattern issue.

    I've got a LN-T4065F which came into my shop with the customer complaining that the test patterns would randomly come up on the screen. Upon testing, the pattern came up on the screen after about 20 minutes of use. We opened it up and did a visual inspection to see if there was any dust or bugs shorting out anything on the board that would generate the test patterns. I'm a bit new to TV repair but on a plasma tv that we recently worked on we strapped out the auto ext on the control board and it generated test patterns on the screen. My thoughts was that maybe something was shorting out that circuit....

    We have the tv open and we have been testing it for about 3-4 hours without the test patterns popping up. My idea was to recreate the problem that way we can know what's wrong.

    Any ideas would be great. Thanks all!

    #2
    Re: Intermittent color test pattern issue.

    Here are some pics.
    Attached Files

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      #3
      Re: Intermittent color test pattern issue.

      heat or cool certain areas on the board. maybe inspect that board for bad solder joints.

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