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HDMI Extender Troubleshooting


 HDMI Balun Problems, HDMI Balun issue


HDMI Baluns and extenders come in many shapes and sizes, so this troubleshooting guide is designed to be quite general to help as many people with issues as possible:


Issue types covered:

  • No Lights on Unit
  • No Signal At All
  • Intermittent cut out
  • Cut out when  other devices are turned on
  • Works for some sources and not others

As always, HDMI handshaking can be very odd with the order things are turned off and on. Make sure all devices are power cycled before proceeding further.


We are here to help, feel free to Contact Us with any specific queries


Power Cycle Order:

  1. Power-off all equipment (At the wall socket).
  2. Ensure all Cables, Splitters, Switches, Extenders are connected within the HDMI Distribution Network.
  3. Power on all Splitters, Switches, Extenders within HDMI Distribution Network.
  4. Power on all displays and set to HDMI input from HDMI Distribution Network (Source device need to be able to contact display to retrieve EDID information)
  5. Power on Sources / Players. Ensure that a path is open from source to display for HDCP handshake negotiation by selecting the proper input on HDMI Switches or HDMI switch/splitter combo's via the remote control

Make sure to never hot-swap any HDMI cables, as this can damage your equipment.


No Lights on Unit:

If the device is not getting any power, this is typically a power supply issue.


Most baluns are supplied with a very cost effective Switch Mode Power Supply. These can fail from time to time. Replace the power supply. Make sure the power supply is the correct one for your device as supplying the wrong voltage is almost certain to cause damage to the unit.


To test this, you can check the voltage with a basic multi-meter.


No Signal At All / Intermittent cut-out

A number of factors can lead to this, so there are a few things to check.


Check you have the sender and receiver around the right way.


The first thing to check is whether the Balun works with lower resolution sources. (This is particularly the case if you are trying to use the balun for 4K). If it is not working with the resolution it should be, check the Cat6 cable and it's terminations are up to standard.


If you are using a balun with two network cables, it is almost always due to the poor quality of this style of unit. I would normally just recommend replacement with a new (Single Cat6) balun of reasonable quality. See here for our range


Check that the Network Cabling is terminated properly. The termination should be the "B" style, with solid conductors (not stranded) (See this PDF for how to terminate to the "B" standard: 568B Wiring. Many extenders will not work with some of the "easy to terminate" style Cat6 cables, such as EZ-RJ45.


Next it is worthwhile checking the HDMI cables. Make sure there are no sharp turns and angles and that all connectors are properly secured. Remove any angle adapters or similar small HDMI devices which many be complicating the issue. Try swapping the HDMI cables for any others you have to see if this is causing the issue. If this needs to be replaced, you can view our range of HDMI cables here: HDMI Cables


It's also usually worth checking that HDMI CEC (HDMI Control) is turned off, as this can always complicate HDMI issues.


Make sure all products have the latest firmware and are fully updated.


If none of these options has worked, try a different balun. We have a range of very good quality options available.

HDMI Extenders


Cut-out when other devices are turned on:


If your balun loses sync when other HDMI devices are switched off and on this is usually an HDCP or HDMI handshaking issue. This can be one of the trickiest problems to solve.


Sometimes a device like BlueStream's Audio-De-embedder, which acts as a permanent HDMI "Sink" can stabilise the issue. Also consider Blustream's HCDP Manager, which locks a devices HDCP signal.


Works for some sources and not others


Again there is no super simple answer. This is usually caused by an HDCP or "handshaking" issue. Make sure the device in question is fully updated.


Otherwise, try reducing the resolution of this source, or try BluStream's HDCP manager.




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