Daktronics Galaxy AF-3500 Series 46 mm - Manual (Page 22)

18 Start-up Procedure
If there are no messages running on the display after the sequence is complete, the display
will go blank. A single pixel flashes in the lower-right corner of the display to show that the
display has power, but no messages are currently running.
5.3 Post Installation Checklist
After starting the display:
If the display uses ventilation fans, ensure they are operational.
Inspect all intake vents and exhaust vents for obstruction.
Confirm proper communications from the control computer to the displays.
Ensure proper communications between display faces when applicable.