Dell E2015Hv Monitor - Manual (Page 54)

54
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Operating the Monitor
This means that the monitor cannot synchronize with the signal that
it is receiving from the computer. See Monitor Specifications for the
horizontal and vertical frequency ranges addressable by this monitor.
Recommended mode is
1600 x 900 (for E2015HV) or 1920 x 1080 (for
E2215HV/E2715H) .
You will see the following message before the DDC/CI function is
disabled.
When the monitor enters the Power Save mode, the following message
appears: