Dell P2723DE 27" 1440p USB Type-C Hub Monitor - Manual (Page 76)

76 │ Operating the monitor
No DP Cable
The display will go into Standby mode in 4 minutes.
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or
No HDMI Cable
The display will go into Standby mode in 4 minutes.
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NOTE: The message may be slightly different according to the
connected input signal.
When the monitor is under DP/HDMI input and a USB-C (C-C) cable is connected
to a notebook that supports DP Alternate Mode, if
Auto Select for USB-C is
enabled, the following message appears: