Chapter 6
Troubleshooting the display
smarttech.com/kb/171745 72
Symptom Troubleshooting steps
A computer is connected to the
display, but only a “No signal”
message appears on the screen.
l Make sure the computer is connected to the currently selected input.
l If the currently selected input is a computer, make sure the computer is not in Standby
mode.
l If the currently selected input is a laptop, make sure that the laptop’s external display
port is enabled.
l Make sure the computer’s display output is configured to recommended resolutions
and refresh rates for the display’s inputs.
NOTE
The following resolutions are recommended: 3840 × 216 or 1920 × 1080.
See Setting a connected computer’s resolution and refresh rate on page64.
l Ensure video cables that connect any computers to the display meet the
recommended specifications.
See Using recommended cables on page65.
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.
l
Press the Home button on the front control panel. If the Home screen appears
correctly, the issue is with the video input.
l Switch to a different input and then back to the first input.
l Make sure any connected computers are on and not in Standby mode.
l Restart the display and any connected computers.
See turning-your-display-on-or-off.htm.
l Make sure the computer’s display output is configured to a recommended resolution
and refresh rate for the display’s inputs.
NOTE
The following resolutions are recommended: 3840 × 216 or 1920 × 1080.
See Setting a connected computer’s resolution and refresh rate on page64.
l Replace the video cables that connect any computers to the display to determine if the
issue is with the cables.
l Make sure the computer’s display output is configured to a recommended resolution
and refresh rate for the display’s inputs.
NOTE
The following resolutions are recommended: 3840 × 216 or 1920 × 1080.
See Setting a connected computer’s resolution and refresh rate on page64.
l Ensure video cables that connect any computers to the display meet the
recommended specifications.
See Setting a connected computer’s resolution and refresh rate on page64.
There are bright spots on the screen.
l
Press the Home button on the front control panel. If it appears correctly, the issue
is with the video input.
l 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.
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