HP C240 - Manual (Page 167)

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Changing Your Workstation’s Hardware Configuration
Changing Your Monitor Type
Changing the Console to External Terminal
In the event that your console stops displaying to your graphics device, use the fol-
lowing procedure to display to console to an external terminal:
1 Turn system power off.
2 Disconnect the PC keyboard connector from the system rear panel.
3 Connect a serial terminal to the Serial 1 connector (the top serial connector) on
the system rear panel.
4 Power on the system.
The system will now display the console to the terminal connected to the Serial 1
port.