HDMI Intermittent Picture

Discussion in 'Cables & Switches' started by mrteabag59, Aug 8, 2017.

  1. mrteabag59

    mrteabag59
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    Hi guys,
    First ever post and surely there's no place better for a concise answer to this.

    Recently I got my room plastered with HDMI cables ran inside the walls.

    Fast forward to now and when I tried to connect via a freeview box I would get 2 seconds of clear visual, maybe a brief bit of sound, followed by a loss of signal for about 8 seconds. This would then repeat over and over.

    So I purchased a more up to date freeview box which improved the situation (a new NOW TV smart box), it's now the other way round 8 seconds of clear video and only 2 seconds of loss.

    It's worth pointing out if I use a heftier tv box (like Virgin Media TiVo, haven't tried Sky) or my laptop. I get (almost) perfect visual.

    Therefore my uneducated guess is that the signal output from the lesser boxes isn't quite powerful enough to go through what I imagine to be the cheapest type of HDMI cable, or there's some sort of electrical interference.
    Either way I believe the cable is at fault.

    This will be tricky (but not impossible) to thread a new cable through the walls, but my plea for help is...

    Firstly do you agree that it's likely the cable.

    Secondly if so what cable would you recommend to truely test the theory.

    Thanks for your time.

    Paul


    Additional points to note:
    *Cable length is only 1m
    *There are newly installed electrical plug sockets near hole for cables
    *TV is old, original Philips Ambilight 1080i. (I wasn't going to mention this as this is for information only, as the original freeview box worked with this TV for years and suddenly in the new set up it didn't work at all meaningonly HDMI cable is different to original setup.
     
  2. ChuckMountain

    ChuckMountain
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    Does the menu work (preferably full screen) and display correctly on your freeview TV.

    It sounds to be more likely that there is something up with your aerial.
     
  3. mrteabag59

    mrteabag59
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    That's a good point, it does seem that when the original box started up (an ICAN) the logo would display fine.

    Then upon loading further into the general tv viewing state the flickering would commence.

    However the full screen would still loose signal (including tv listing/channel navigation menus) from this point on.

    Also a brand new freeview now improved the longevity of the visual without touching the ariel cable.
     
  4. andy1249

    andy1249
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    At 1 meter, all HDMI cables should perform identically.
    Most likely the cable in the wall got damaged during work or is indeed too close to the mains.

    Get another one meter cable.
    Amazon basics or Tescos do them.
    Plug it direct from source to TV.
    Test.
    If you still have probems then its the TV or source.
    If not, its the cable in the wall.
     
  5. ChuckMountain

    ChuckMountain
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    As Andy says try another cable. You must have one lying around somewhere you just need to temporarily plug it in. Make sure you plug it in the same HDMI port to eliminate that too.
     

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