BenQ RM8602K 86" Class 4K UHD Educational Touchscreen LED Display - Manual (Page 69)

69 Troubleshooting
The picture is distorted with strange patterns.
Possible causes Possible solutions
The video cable is not connected
properly. Make sure the video cable is connected firmly to the
display.
The image format is not
supported by your display. Check the specifications to verify the display’s supported
formats.
The picture does not fill up the full screen when the input source is D-Sub (VGA).
Possible causes Possible solutions
The picture is not properly
zoomed.
Go to Screen > Aspect > Wide Zoom or Zoom to
adjust the display’s geometry and time frequency
parameters. Refer to the user manual for more
information on the menu options.
Note the picture may be distorted or stretched if fitted to
the screen.
You are running the display at its native resolution, but the image is still distorted.
Possible causes Possible solutions
Images from different input
sources may appear distorted or
stretched on the display running at
its native resolution.
Go to Screen > Aspect to set a proper aspect ratio for
the input source.
Sound can be heard but no image is displayed.
Possible causes Possible solutions
The video cable is not connected
properly. Make sure the video cable is connected firmly to the
display.
(If the input is HDMI)
Poor cable quality.
Try with another HDMI cable.