Hitachi CM2111M User Manual page 14

Turn on the Power Switch of the monitor first, then the computer.
NOTICE :
Otherwise the monitor may operate unusually.
2. If the picture doesn't appear, turn OFF the power switch, make sure of the following
and wait at least 30 seconds to restart the monitor.
Make sure the power switch of the computer, power cord connection, signal
cable connection and the input sync. signal are right.
3. If the colour is impure on the screen after turning ON the monitor, wait for 10 mlnutes
and press the Degauss button.
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