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T ESTING V IDEO O UTPUT A-3If the test pattern does not appear, you should test the Component, S-VHS,Composite and D1 outputs separately to determine if video output ispresent in any of these modes.Table 1-1SymptomsTroubleshooting Video OutputActionsColor bars do not display1. Ensure that video lock light on the front of the AV I/O isgreen.2. Check the connection from the AV I/O to the monitor;make sure that the monitor’s power is On and configuredcorrectly.3. Connect monitor to another source with the same cablingto verify cables and the monitor setting.4. Try a different type of video output from the AV I/O.5. Shut down the application, gently remove the AV cablefrom the AV I/O and reseat it. Run test again.Color bars are scrambledColors display incorrectlyVerify that the monitor is receiving sync. Note that the YUVoutput does not contain a clock, so a sync source must beused. It is possible to use the S-VHS or composite outputs ofthe AV I/O as the sync source to the video monitor.1. If running YUV to the monitor, verify that the cabling iscorrect and that the monitor is set to display YUV (not RGB).2. Try a different type of video output from the AV I/O.3. If colors still display incorrectly, contact Sonic TechnicalSupport.