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doubt, replace them. Always take care inserting and
extracting your HDMI cables. Keep cables lengths as
short as possible.
14) Picture snow/HD ‘noise’
– represents a poorly
established signal that may be caused by poor quality
terminations or excessive cable lengths. Try swapping the
display adaptors from a location you know 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.
Breaks in the lines of transmission e.g
patch panels, wall
outlets, stranded cable use or excessive cable length are
likely to reduce stability and range.
15)
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.
16) Blu-ray: Deep Colour
– Deep Colour, 1080p and 3D
is supported by the line of transmission in your installation.
17) Blu-ray: Resolution –
if a reduction of resolution to
720/1080i produces an image, cable issues such as
interference, patch panels, wall outlets, stranded cable
use or excessive cable length are likely restricting
transmission of a full 1080p signal.
Transmissions should support 1920x1080p @60Hz - if
problems are experienced at 60Hz, try lowering to 50Hz.
18) 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 amplifier?
19)
4K -
Are you trying to pass a 4K signal? This device
does not support UHD 4K resolutions
20) 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 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, 60Hz. Higher resolutions available
for graphics-based systems require higher bandwidth
that may affect transmission of signals as well as
incompatibility with devices.
