HDMI Cabling and Troubleshooting Guide

How to Troubleshoot HDMI Connection Problems

  1. Use only HDMI 18Gbs or 48Gbs “Premium Certified” HDMI cables. Premium Certified cables have an official hologram logo and have passed HDMI formal testing. Cables certified as 8K should work fine. Note that we have seen cases where a 10K certified cable caused issues, so out of caution we recommend against using 10K cables at this time.
  2. Use only HDMI cables at least 6 feet (2m) in length. Some integrators prefer to use short cables for interconnects in the rack to help keep things tidy. And perhaps counter-intuitive, cables shorter than 6 feet can result in too strong of a signal. For interconnects, we recommend using high quality cooper cables.
  3. Please do not use active fiber cables from source devices such as Apple TV, Blu-ray players, media players etc. – _such devices often do not provide sufficient power for the cable.
  4. Use only active fiber HDMI cables for any runs over 25 feet which come pre-terminated. We highly recommend using active fiber HDMI cables for long lengths that are pre-terminated at the factory (and not running your own fiber and terminating it yourself). We do not recommend using HDBaseT solutions such as HDMI over CAT6 with baluns. This can lead to intermittent or other signal issues. Keystones and Punch-downs can cause a high probability of failure in some installations. And further, these cables cannot handle the transmission of upscaled 5k and 8k resolutions (which will require HDBaseT 3.0 later).
  5. Make sure that any directional cable is installed in the right direction. Active fiber HDMI cables are directional, meaning that there is a designated Source end, and a designated Display end. Please make sure that the Source end is connected to your AVR, sources or HDMI switch that feeds the video processor. And the display end should be connected into the video processor port labelled “Input”.
  6. Make sure that all cables are plugged in tight and firmly seated. To be sure, remove the cable and plug it back in.
  7. Make sure that the HDMI cable running from your video processor to the display is plugged into the video processor port labelled “Output” and NOT into any unlabelled HDMI port on the back of the video processor.

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