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What should you do first when a display shows a black screen instead of presentation content after hot- swapping cables?
Correct Answer: A
Explanation/Reference: Explanation: CSCuq50609 Symptom While sharing presentation content either during a call, or outside of a call (local presentation), main or auxiliary displays show a black screen, rather than the presentation content. Conditions Display cables were plugged and unplugged while they system was running (known as "hot swapping" the display cables). Workaround Reboot or power cycle the system. Hot swapping of display cables is not supported. Reference: http://www.cisco.com/c/en/us/td/docs/telepresence/ix_sw/8_x/release/notes/ ix_release_notes.html