Avocent Emerge MPX Installer/User Manual page 90

76 MPX Extender Installer/User Guide
• Improper initial power sequence: It is possible that the source device obtained EDID
information from the MPX transmitter before device information was obtained from the
display device. To resolve this, follow the suggested power up sequence provided in "Ini-
tiating A Media Session" on page 38.
• The display device is not a plug-and-play ready: It is possible that the display device
does not offer EDID information. The Display Device Settings page will indicate if the
display device is not plug-and-play ready. If this is the case, use the provided table to
enable appropriate resolutions for the display device. Be careful not to enable resolutions
that the display cannot support.
• The display device submitted an improperly formed EDID string: Should this happen,
the transmitter will discard the entire string. Thus, the default EDID will remain in effect.
In this case, use the Display Device Settings table on the MPX receiver to enable appropri-
ate resolutions for the display device.
• The VGA cable is damaged or does not pass data on the DDC channel: Pins 12 and
15: of a VGA cable represent DDC data and clock, respectively. EDID information is
passed via the DDC channel. Verify proper operation of your VGA cable.
No video is visible: This is an indication that the display device is either not properly connected or
is not compatible with MPX extenders. The following troubleshooting steps may help to resolve
this issue.
• For all display devices:
• Launch your browser to the Connection Status page on the transmitter. Helpful error infor-
mation may be displayed in the Transmitter Status table.
• Connect a display device directly to your source device. If active media is not displayed,
then resolve the issue before attempting to extend the signal. If active media is present,
then verify proper operation of the transmitter and receiver video cables and adapters,
if any.
• Power off all receivers other than the primary. Working with a reduced network will allow
you to simplify the troubleshooting environment.
• View the resolution and frame rate tables in the appendix of this manual to determine if
your source device is operating within supported parameters.
• If you have selected wireless operation, select a different channel in the Wireless Media
LAN settings to ensure that there is not a conflict with other nearby wireless devices.
• It might be useful to attempt using a wired media LAN to check for possible radio-
related issues.
• Make sure that you have selected a primary receiver. The primary is responsible for gener-
ation of EDID information for the source device.
• For HDMI or DVI-D display devices: