Dell UltraScan P780 User Manual - Page 12
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1.
Press and hold the
Holding in this button for longer than 2 seconds erases all
RESET
button
data in the User Settings memory and returns the monitor
settings to the factory defaults.
All OSD Messages
A warning message may appear on the screen indicating that the monitor is out of sync.
This means that the monitor cannot synchronize with the signal that it is receiving from the
computer. Either the signal is too high or too low for the monitor to use. See
Specifications
for the Horizontal and Vertical scan ranges addressable by this monitor.
This means that the video cable may not be properly connected. Check if the video cable
is securely connected.
RESET button for more than 2 seconds.