SMART Board GX - Page 64

Chapter 5 Troubleshooting the display
smarttech.com/kb/171744 64
Symptom Troubleshooting steps
The image on the screen is distorted.
OR
There are lines, snow or, other visual
noise on the screen.
OR
The image is flickering or flashing.
OR
The image is dim.
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Press the Home button on the front control panel. If the Home screen appears
correctly, the issue is with the video input.
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Switch to a different input and then back to the first input.
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Make sure any connected computers are on and not in Standby mode.
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Restart the display and any connected computers.
See Turning the display on or off on page54.
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Make sure the computer’s display output is configured to a recommended
resolution and refresh rate for the display’s inputs.
Note
The recommended resolutions are 3840 × 2160 or 1920 × 1080.
See Using recommended cables on page40.
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Replace the video cables that connect computers to the display to determine if the
issue is with the cables.
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Ensure video cables that connect computers to the display meet the recommended
specifications.
See Using recommended cables on page40.
There are bright spots on the screen.
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Press the Home button on the front control panel. If it appears correctly, the
issue is with the video input.
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Take a photograph of the screen and send it to SMART support. If SMART support
determines that the issue is with the screen and the display is under warranty, you
may be eligible for a replacement.
Colors don’t appear correctly.
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Check the Image mode settings.
See Image, audio, and menu setting on page86.
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Press the Home button to determine whether the color issue occurs on the Home
screen only. If the Home screen appears normal but a specific video input does not,
test the connection cables and video source equipment by temporarily replacing
them.
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Be aware that if two or more displays are mounted side-by-side, there will be
minor differences in colors across the displays. This issue is not unique to SMART
products.
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If the screen is completely lacking one primary color (red, green, or blue) or the
color problems occur on the Home screen, provide a photo of the screen to SMART
support.
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If you’re using an analog video input, such as VGA, AV, or YPbPr, use a different
cable or connect a different source to see if the issue is with the cable or input
source.
The image is cut off or shifted to the
left or right.
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Adjust any connected computer’s video settings, particularly zoom, crop, and
underscan.
See the computer’s operating system documentation.
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If any connected computers’ desktops are entirely black, change them to dark gray
or a different color.
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If any connected computers’ desktops are extended across multiple screens,
duplicate the desktops across the screens or set the display as the only screen.