Sony CPD-G420 - Manual (Page 9)

9
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Selecting the input signal
You can connect two computers to this monitor using the video
input 1 (HD15) and video input 2 (BNC) connectors. To select
one of the two computers, use the INPUT switch.
Move the INPUT switch.
The selected connector appears on the screen for 3 seconds.
“INPUT 1”: HD15 or “INPUT 2”: BNC appears on the screen.
Note
If no signal is input to the selected connector, NO SIGNAL appears on the
screen. After a few seconds, the monitor enters the power saving mode. If
this happens, switch to the other connector.
INPUT
1 2