1 red vertical line, then a green or red line

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  • mjk
    New Member
    • Jun 2010
    • 3
    #1

    1 red vertical line, then a green or red line

    Hanns-g HC 194D. 2.5 years old. Started with 1 vertical red line after heating up.
    Replaced the bulging electrolytic caps. Okay for about a month. Then it reoccurred. I found that by pressing different areas of the top circuit board attached to the LCD, it would go away. The back casing is still off. Now I get 1 vertical green line at start up which goes away. Once in a while it may reappear or a red line may.

    Attached circuit board area image.
    Yellow circle seems to be a good pressure point.
    MAX1977.. is a regulator
    AR7 unknown
    AS15F... unknown
    SMD caps uF and v are all unknown.
    It should be against some law to manufacture, sell or install unmarked caps

    Any idea as to what may be causing the problem?
    Thanks, Mike
    Attached Files
    Tags: None
    • Tomthetech
      New Member
      • Jun 2010
      • 3
      #2
      Re: 1 red vertical line, then a green or red line

      Could be a possibility that when you put pressure on that spot that you've marked, disturbs whatever is plugged in at the bottom. (Ribbon)? Check in that area, maybe remove and refit. Check for cracks.

        Comment

        • lucky13
          Badcaps Veteran
          • Aug 2007
          • 412
          #3
          Re: 1 red vertical line, then a green or red line

          Most likely where you were pressing were affecting the connections where you marked the word "TOP". There is a bad connection there somewhere....

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