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User Guide for Cisco Digital Media Manager 5.4.x
OL-15762-05
Chapter 15 Touchscreens, Projectors, and Displays
Reference
FAQs About Product Quality
•
Why are some pixels unexpectedly bright, or black?
Q.
Why are some pixels unexpectedly bright, or black?
A.
Cisco LCD displays use advanced semiconductor technology with extremely high precision.
Nonetheless, the red, green, blue and white pixels might seem unexpectedly bright sometimes, or
you might notice some black pixels. This is not the result of low quality or a malfunction and you
can continue to use your display without incident.
Troubleshoot Cisco Professional Series LCD Displays
•
Troubleshoot the Power Indicator, page 15-40
•
Troubleshoot Image Quality, page 15-40
•
Troubleshoot Audio Quality, page 15-41
•
Troubleshoot the Handheld Remote Control Unit, page 15-41
•
Run a Diagnostic Self-Test on a 40- or 52-inch Cisco LCD Display, page 15-42
Troubleshoot the Power Indicator
Problem The screen is blank AND the power indicator is off.
Solution
Ensure that the power cord is firmly connected and the display is turned on.
Problem The power indicator blinks.
Solution
Wait for less than 1 minute. The display is saving changes made to its settings.
Troubleshoot Image Quality
Problem A message states, “Check Signal Cable.”
Solution
Make sure that the:
•
Signal cable is firmly connected to the video sources.
•
Video sources are turned on.
Problem The image rolls vertically.
Solution
Make sure that the signal cable is securely connected.
