Installation and Operation, cont’d
Troubleshooting
No output signal — Check that the front panel LED is on (amber shows that the unit is receiving power, green shows that it is also receiving an input signal). If LED is not lit, check the power supply and/or video input connections to the unit (see page
No output signal or poor quality signal — Check the integrity of the cabling from the source device to the distribution amplifier and from the distribution amplifier to each of the display devices.
DVI signals run at very high frequency and poor connections can cause degradation or loss of the signal, or jitter.
•Signal transmission distance can vary greatly and depends on signal resolution, cable type, cable quality, graphics card and the display used in the system.
•Use only cable that is designed for DVI signals.
•Limit or avoid the use of adapters or couplers.
Display device displays a flashing black or blue screen, snow or other distortion — A device that is not HDCP compliant may be receiving
The DVI DA Plus series distribution amplifiers are not
Signal on some displays but not others — Reboot the source device.
When the source device boots up, the distribution amplifier's EDID handling feature ensures that the output resolution of the source device is matched to the requirements of the display device with the lowest resolution.
If an additional display device is added, which requires an even lower resolution, the image will not be displayed correctly on that monitor until the source device is shut down and rebooted. At that time, the distribution amplifier's EDID handling
will ensure that the output resolution of the source device is recalibrated to meet the needs of the additional display device.