DA1907LX Ditto-Amp 1-In, 2-Out VGA DA
User’s Guide
400-0045-008
5
7. Operation
The DA1907LX requires no adjustments for optimal performance. Once
set-up, the DA1907LX will work trouble-free without user intervention.
8. Troubleshooting Guide
We have carefully tested and have found no problems in the supplied DA1907LX. However, we would like to offer suggestions for the following:
DA1907LX
Symptom
Resolution
LED is OFF
1. Make sure the unit is plugged into a working AC outlet and the DC plug is inserted all the way into the switcher.
2. Use only the power adapter provided.
LED is NOT RED
The LED should be ON and RED when power is applied.
The LED should be ON and GREEN when the unit is receiving power and a SYNC signal.
1. Make sure the supplied adapter is plugged into a working AC outlet and that the outlet has power.
2. Verify the DC power plug coming from the AC adapter is plugged all the way into the DA1907LX.
3. If adapter has power and the LED is still not on, the DA1907LX or the power adapter may require service.
LED is NOT GREEN
The LED should be ON and RED when power is applied.
The LED should be ON and GREEN when the unit is receiving power and a SYNC signal.
1. Disconnect the video input from the DA1907LX and verify the LED is ON and RED indicating power is present.
2. Reconnect the computer's video output.
3. Verify the computer output is operating correctly by connecting it directly to a local monitor.
4. Disconnect the video output form the DA1907LX and then reconnect after 5 seconds. The computer screen should
flash when it detects the external device and then output the video. At this time the LED should be green and the
output signal should be present.
5. Make sure the computer is set to output external video using the function keys or the Windows key plus the letter
“P” (Win+P). If the video is present on the output but the LED is still not green, the DA1907LX is working but the
LED may have a problem.
No Display
Set the computer for an output of 1024x768 at 60 Hz refresh rate.
Most devices can display this resolution without any problems.
1. Check the source and make sure there is a signal present.
2. Make sure the display has power and is turned on.
3. Make sure the correct input is selected on the display.
4. Verify the refresh rate of the computer/laptop is compatible with the display. Some laptops provide a refresh rate of
75 Hz that some displays do not accept.
5. Verify the output resolution of the computer/laptop is compatible with the display.
6. Make sure the computer is set to output external video using the function keys or the Windows key plus the letter
“P” (Win+P).
Poor Output Image
1. The source resolution may not be compatible with the projector or other display device. Try other resolutions from
the source.
2. The source and display may not be compatible. Connect the source directly to the input of the projector or other
display device. If the image is poor the devices may be incompatible.
