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TROUBLESHOOTING
10) HDMI lead condition and quality
– HDMI cables
and connectors are delicate and can be damaged much
easier than component or coax cable. Furthermore,
lead quality varies dramatically, particularly in lower price
brackets. Swap HDMI leads and check operation –
damage to or quality of your leads could be the problem.
If in doubt, swap them over. Always take care inserting
and extracting your HDMI from matrix ports so as not to
damage the connectors or ports.
11) Picture speckles/HD ‘noise
’ – represents a poorly
established signal that may be caused by poor quality or
excessive HDMI cable lengths. Try swapping the display
adaptors from a location that is functioning properly or
swapping the outputs of the matrix switch used.
If the problem remains on the same screen this may be
caused by a connection problem between matrix and
display – turn off all equipment and swap the signal
carrying cables at both ends to ascertain if the cable or
termination is at fault.
HD Noise (NO image)
may be an HDCP Issue between
the source and display but poor cabling can also cause
this due to poor communication.
12) Blu-ray: 3D
– is the equipment used 3D enabled/
compatible? Is a 3D disc being played in a 3D enabled
Blu-ray player or through a compatible AV receiver?
16) Colour distortion
– a pink or green screen indicates
an incompatibility between colour spacing formats – the
commonly used RGB or YUV used by older displays.
Some sources allow switching between RGB and YUV
which may solve any colour problems. If not, try changing
the HDMI cable between the source and the matrix to rule
out defective cabling.
No Sound or Poor Quality Audio
Audio is transmitted within the video signal – there is no
separate audio track – so generally a problem with sound
will be accompanied by a problem with picture. However,
if technical issues with audio are experienced, the cause
is typically communication between sources, displays
and/or AV receiver settings.
1) Have specific speaker sets or zones been
enabled?
Some AV receivers allow individual speaker
selections assigned to specific zones in the set up so
check the speakers used are fully connected to the
amplifier and correctly assigned within the system set up.
It may be an EDID issue in that the source reads the audio
EDID from the display and only requests two channel
audio and EDID copy from the AVR may be required or
use an embedded EDID in the AMP or Matrix.
Note:
If problems are experienced when an AV receiver is
used, the cause is usually the settings of the AVR itself.
Refer to the AVR manufacturer’s guidelines on the correct
settings to use for your requirements.
2) Consistency of audio output between devices
– Is
there any discrepancy between the audio output of the
source, the audio or zonal settings of the AV receiver and
the speaker configuration used needed for successful
audio replication? If outputting 7.1, make sure all devices
connected are also outputting 7.1
Note: Occasionally with some sources, the device settings
allow the specification of audio output through a TV or an
HDMI port. If using an AV receiver, check the HDMI output
option is selected.
3) Do all the local sources work through the AV
receiver?
Check the operation of each source individually.
Bandwidth
1)
If using a graphics-based source (such as a PC/Mac/
media server), make sure the source resolution is set to
a maximum of 1080p, 50Hz. Higher resolutions available
for graphics-based systems require higher bandwidth
that may affect transmission of signals as well as
incompatibility with devices.
IR
1) Check emitters at the IR TX transmitter end
and receivers at the IR RX receiver end
– are they
connected to the correct ports on the matrix and display
receiver.
2) Is the emitter correctly positioned on the source?
Fix the emitter directly over the infrared sensor of the
source and attach using the adhesive backing.
Note: Locate the infrared source sensor by using a
flashlight to find the sensor within the facia of the source
display. If necessary, secure the emitter over the sensor
with a small amount of contact adhesive.
