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TROUBLESHOOTING
can impact on signal strength, resulting in reduced
transmission that may manifest itself in incorrect picture
quality, picture dropping out or a complete lack of picture.
5) Cable Choice and Signal Reduction
– Ensure good
quality high speed HDMI 1.4v cables are used, with
care taken to avoid bending, twisting, snagging or any
other form of obstruction to the cable that may interfere
with successful transmission of an HDMI signal - we
recommend using WyreStorm Express HDMI cables.
If using an extender set to lengthen transmission between
matrix and display, please note that the use of stranded
patch leads as interconnects between patch panels or
wall outlets or the use of CCA (Copper Clad aluminium)
cables can reduce transmission rates by up to 40%. We
recommend solid core straight through with minimum
connections used wherever possible.
6) Correct connection
– It may seem obvious but
double check all cables are fully inserted and connected
to the correct ports.
NOTE
Even a fraction off can be the difference
between a perfect picture and a blank screen.
Double check all connections are firmly made in the
correct ports.
7) Cable wired to 568B standard?
If using an UTP
extender to lengthen transmission from the matrix, check
the cable wired and terminated correctly and are those
terminations connected to the correct ports? Incorrect
wiring and termination will result in unstable operation or a
blank screen.
8) Electrical interference
– Could any form of electrical
or environmental interference be generated that may be
effecting signal transmission? If so, attempt to remove
the source of interference or move the cable run to
decrease the effects of the interference.
9) Is a picture achieved when connecting the source
directly to the display?
If not then the problem could lie
with the input or output device rather than the means of
distribution.
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?
13) 4K
- Are you trying to pass a 4K signal? Ensure
connected devices are 4K enabled, correctly configured
and outputting compatible transmissions.
4K resolution - ensure all connected devices are
compatible with the UHD or DCI resolutions being
transmitted. See Specification section for more details
1080p - 1920x1080p, 60Hz (if problems are experienced
at 60Hz, try lowering to 50Hz)
Combined 4K / HD distributions - a WyreStorm EXP-
CON-4K-DD scaler may be required between receiver and
display to scale down 4K transmissions to 1080p 24fps
for HD screens and upscale 1080p to 4K 30Hz for UHD
displays.
14) 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,