
Troubleshooting
Symptom Possible Cause Action
Erratic
behavior. Unit not receiving
enough power. Use a DC 5.3V power adapter if
you are not already using one. If
you are already using a power
adapter, check that it matches the
system specifications (DC 5.3V),
and that it is plugged in and
functioning properly.
Video
doesn’t
display
on some
ports.
DVI specification of
the source device
doesn’t match the
DVI specification of
the DVI cable and/or
the DVI display
device.
There are three DVI standards:
DVI-A; DVI-D; and DVI-I. Make
sure that the DVI specifications of
the source device, cable, and
monitor all match.
Note: Some monitors are able to
support multiple DVI signals.
DVI-D only supports resolutions
up to 1280 x 1024
No DDC2B monitor
on Port 1. Since Port 1 is the port that
supports DDC2B, there must be a
monitor that supports DDC2B on
Port 1.
Port 1 monitor
resolution set too
high.
The resolution of the monitor on
Port 1 must not exceed the
maximum resolution of any of the
other monitors.
Port 1 monitor
resolution not
supported by other
monitors.
The monitor on Port 1 must be set
to a resolution that the other
monitors support.
Mixing of Apple
Cinema Display and
LCD monitors.
The monitors must all be Apple
Cinema Display monitors, or all
LCD monitors.
- 12 -
2005-03-02