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 1280 x 1024 (for E1913S) or 1440 x 900 (for E1913) or 1680 x 1050 (for
E2213).
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: