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Chapter 4: Troubleshooting
4. Troubleshooting
4.1. Common Problems
In most cases, nearly every issue with the Multi DVI System can be resolved by
checking the fiber optic or CAT5/5e/6 cable and making sure that it’s properly ter-
minated and in the case of CAT5/5e/6 cable, pinned to the TIA/EIA 568B wiring
specification. However, there may be other problems that cause the system not to
perform as it’s designed. Below are solutions to the most common installation
errors:
Problem: No video signal at the transmitter local port or at the receiver.
Solution:
• Check that both units are powered.
• Make sure the cable is terminated correctly.
• Is the display device powered on and functioning?
• Power on units in sequence (display, receiver, transmitter, video source).
• Display may not be correctly identified by source device. See Appendix D for
DDC communication issues.
Problem: Video signal is poor.
Solution:
• Check all cable connections.
• See Appendix C for changing compression mode.
• The video signal’s refresh rate may be set too high. Reset to a lower refresh rate
in your monitor configuration menu.
• In 1080p mode, the PC graphics card needs to be set to reduced clock rate
mode. Contact the graphics card manufacturer.
4.2 Contacting Black Box
If you determine that your Multi DVI System is malfunctioning, do not attempt
to alter or repair it. It contains no user-serviceable parts. Contact Black Box
at 724-746-5500 or info@blackbox.com.
