HDMI Signal interference

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  • ScoutMaster
    New Member
    • Oct 2011
    • 2
    #1

    HDMI Signal interference

    I am running HDMI over cat 5 to a panasonic 103" plasma. Distance is not that far (about 15m) and signal has been fine for months.
    Just recently, there is an intermittant,broken up, horizontal line rolling very fast up the screen that looks like analogue interference. It also runs through a HDMI switch but doen't appear on the secondary source. Any ideas?
    Tags: None
    • shovenose
      Send Doge Memes
      • Aug 2010
      • 6575
      • USA
      #2
      Re: HDMI Signal interference

      Do you walk often over the cable, is it heavily creased somewhere, or have you dragged something heavy across the cable lately?

        Comment

        • ScoutMaster
          New Member
          • Oct 2011
          • 2
          #3
          Re: HDMI Signal interference

          The cable is installed through a riser and from a rack. No chance of crush/creasing.

            Comment

            • tedjar
              Senior Member
              • Dec 2010
              • 51
              • USA
              #4
              Re: HDMI Signal interference

              This is a situation that needs a "divide and conquer" troubleshooting technique...

              Lets consider the potential problems:
              1. The Source - Probably not since the 2nd display is OK
              2. The Switch - Could only one side be bad?
              3. The HDMI via Cat5 setup
              4. The Monitor


              Unless the monitor is mounted up somewhere inaccessible, I'd try to plug a DVD player or other HDMI source in direct via the same input in question. See where that goes, then you know you are chasing a monitor problem or a signal transmission one.

              I want to say ground loop, but not sure if that has any relevance since HDMI is digital. I do have fond memories of chasing hum bars running composite video to projectors over 150ft+ of RG6 though.

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK
                  #5
                  Re: HDMI Signal interference

                  Originally posted by ScoutMaster
                  to a panasonic 103" plasma
                  Dear Santa.......

                  On a more serious note, it sounds more like a problem with the TV than the signal - have you tried connecting something near to the TV?
                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment

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