Why do I receive an Out of Scan Range, Synch out of Range or No Sync Input message when I power my system off? - KB Article - 164088
System is powered off and not sending a signal to the monitor.
When the system is powered off, it stops sending a signal to the monitor. These messages indicate that the monitor is no longer receiving a signal from the computer.
Out of Scan Range, Synch out of Range, or No Sync Input Message When the System is Powered Off.
When you shut down your system, one of the following messages may appear on the monitor screen:
Out of Scan Range
Synch Out of Range
No Sync Input
These messages may flash by quickly or may stay until the monitor is powered off.
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