Extron electronic DVI DA4 - Manual (Page 24)

DVI DA2 and DVI DA4 • Installation and Operation
Installation and Operation, cont’d
2-12
Troubleshooting
No output signal — Check that the front panel LED is on (lit
green). If it is not, check the power supply connections to the
unit (see page 2-10).
No output signal or poor quality signal —
Check the integrity
of the cabling to output 1 and ensure that output 1 (Local
Monitor) is connected to the distribution amplifier before
powering on the source device.
If the source device cannot communicate with output 1 when it
is being powered on, it may not be able to send a video signal or
the signal may have the wrong resolution or refresh rate.
No output signal or poor quality signal —
Check the input
and output cabling (see page 2-8). DVI signals run at very high
frequency and poor connections can cause degradation or loss of
the signal, or jitter. To avoid this:
Use only cable that is designed for DVI signals. •
Limit or avoid the use of adapters. •
Display device displays a flashing black or blue screen, snow
or other distortion
— A device that is not HDCP compliant may
be receiving HDCP-encrypted signals.
The DVI DA2 and DVI DA4 are not High-Bandwidth Digital
Content Protection (HDCP) compliant. They will only pass
HDCP-encrypted signals to the local output device.
Signal on local monitor but not on other displays —
Check
that all output devices (monitors or projectors) can handle
resolutions equal to or greater than that of the local monitor.